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Respiratory Virus Report, Week 12 - ending March 25, 2023

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Organization: Public Health Agency of Canada

Please note that the Respiratory Virus Detection Surveillance System (RVDSS) is a sentinel laboratory surveillance system that does not capture all respiratory virus testing performed in Canada; differences may exist between the data presented in this report and provincial/territorial epidemiological reports. SARS-CoV-2 laboratory data is included in this report to facilitate the comparison of positivity with other respiratory viruses. Interpretation should be made with caution as testing practices differ among viruses.

For additional SARS-CoV-2 surveillance information, please refer to the COVID-19 epidemiology update.

Overall summary

In week 12 (week ending March 25, 2023) in Canada, participating RVDSS laboratories reported 5,462 detections of SARS-CoV-2 from 48,292 tests (11.3% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 6,999 to 23,518 tests), activity of nearly all viruses is within or below expected levels.

  • Activity of influenza remains low and stable at inter-seasonal levels. Influenza B (300 detections; 1.3% positive) is circulating at higher levels compared to influenza A (142 detections; 0.6% positive).
  • Activity of all other non-SARS-CoV-2 respiratory viruses is near or below expected levels typical of this time of year.
  • 33/35 sentinel laboratories reported surveillance data

On this page

Abbreviations:
ADV
Adenovirus
Atl
Atlantic Canada
BC
British Columbia
Can
Canada
EORLA
Eastern Ontario Regional Laboratory Association
EV/RV
Enterovirus/Rhinovirus
Flu
Influenza
Flu A(H1)pdm09
Influenza A(H1N1)pdm09
Flu A(H3)
Influenza A(H3N2)
Flu A(UnS)
Influenza A(Unsubtyped)
HCoV
Human coronavirus 229E/OC43/NL63/HKU1
HMPV
Human metapneumovirus
HPIV
Human parainfluenza virus
HSC
Health Sciences Centre
N.C.
Data not collected
N.R.
Data not reported for current week
ON
Ontario
PR
Prairies
P.H.O.L.
Public Health Ontario Laboratory
QC
Quebec
RSV
Respiratory syncytial virus
RVDSS
Respiratory Virus Detection Surveillance System
SARS-CoV-2
Severe acute respiratory syndrome coronavirus 2
Terr
Territories of Canada
UHN
University Health Network

Respiratory virus detections

Table 1: Respiratory virus detections for the week ending March 25, 2023 (surveillance week 2023-12)
Reporting Laboratory SARS-CoV-2 Tested SARS-CoV-2 Positive Flu Tested A(H1)pdm09 Positive A(H3) Positive A(UnS) Positive Total Flu A Positive Total Flu B Positive RSV Tested RSV Positive HPIV Tested HPIV 1 Positive HPIV 2 Positive HPIV 3 Positive HPIV 4 Positive Other HPIV Positive ADV Tested ADV Positive HMPV Tested HMPV Positive EV/RV Tested EV/RV Positive HCoV Tested HCoV Positive
Newfoundland 459 50 336 0 0 1 1 2 336 22 336 6 0 33 3 0 336 7 336 10 336 36 336 7
Prince Edward Island 643 129 136 0 0 0 0 0 136 10 12 0 0 1 0 0 12 1 12 3 12 3 12 0
Nova Scotia 2168 346 1043 0 0 0 0 1 1043 15 25 0 0 0 0 0 25 0 25 1 25 1 25 1
New Brunswick 1337 222 1150 6 0 4 10 2 1083 12 83 0 1 1 0 0 83 3 83 9 83 15 83 5
Atlantic 4607 747 2665 6 0 5 11 5 2598 59 456 6 1 35 3 0 456 11 456 23 456 55 456 13
Région Nord-Est 1807 172 1235 0 0 32 32 7 299 18 39 2 0 1 0 0 40 9 40 2 N.C. N.C. 40 8
Québec-Chaudière-Appalaches 3277 244 482 0 0 10 10 6 460 5 158 0 0 2 0 0 170 14 158 9 N.C. N.C. 158 24
Centre-du-Québec 2707 352 159 0 0 1 1 2 155 6 18 0 0 1 0 0 18 6 18 0 N.C. N.C. 18 4
Montréal-Laval 4079 388 2474 0 0 27 27 98 1411 32 409 0 1 10 0 0 409 22 410 10 N.C. N.C. 409 24
Ouest du Québec 2037 248 567 0 0 4 4 8 547 8 15 0 0 0 0 0 15 0 15 2 N.C. N.C. 15 1
Montérégie 2806 293 699 0 0 8 8 13 650 14 2 0 0 0 0 0 2 0 2 0 N.C. N.C. 2 0
Province of Québec 16713 1697 5616 0 0 82 82 134 3522 83 641 2 1 14 0 0 654 51 643 23 N.C. N.C. 642 61
P.H.O.L. - Ottawa 646 186 231 0 0 0 0 1 231 4 156 0 0 0 0 0 156 2 156 19 156 16 156 7
EORLA 1663 138 329 0 0 2 2 2 329 3 41 0 0 0 0 0 41 3 41 3 41 8 41 6
P.H.O.L. - Kingston 439 38 69 0 0 0 0 0 69 1 54 0 0 0 0 4 54 0 54 5 54 20 54 6
UHN / Mount Sinai Hospital 2051 100 636 0 0 0 0 6 636 3 125 0 1 1 0 0 125 1 125 3 125 6 125 4
P.H.O.L. - Toronto 613 118 732 5 1 0 4 1 732 18 680 0 0 0 0 16 680 15 680 64 680 69 680 56
Sick Kids Hospital - Toronto N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R.
Shared Hospital Laboratory 1999 136 1999 2 1 0 3 18 1999 11 2004 0 0 0 0 18 2004 28 2009 94 2009 76 2009 39
P.H.O.L. - Sault Ste. Marie 37 6 22 0 0 0 0 0 22 1 21 0 0 0 0 1 21 0 21 0 21 10 21 2
P.H.O.L. - Timmins 196 7 27 0 0 0 0 0 26 0 15 0 0 0 0 0 15 0 15 2 15 8 15 0
St. Joseph's - London 2594 233 741 0 0 3 3 6 741 12 66 0 0 0 0 4 66 5 66 9 66 8 66 3
P.H.O.L. - London 689 153 253 0 0 1 1 0 253 1 196 0 0 0 0 8 196 5 196 9 196 26 196 6
P.H.O.L. - Orillia 5 4 33 0 0 0 0 4 33 0 33 0 0 0 0 1 33 1 33 4 33 8 33 0
P.H.O.L. - Thunder Bay 135 25 32 0 0 0 0 0 32 0 29 0 0 0 0 0 29 0 29 2 29 11 30 7
P.H.O.L. - Sudbury 41 4 28 0 0 0 0 0 28 2 28 0 0 0 0 2 28 0 28 5 28 0 28 1
P.H.O.L. - Hamilton 457 116 278 0 0 0 0 4 278 0 209 0 0 0 0 4 209 4 209 16 209 24 209 23
P.H.O.L. - Peterborough 172 15 43 0 0 0 0 0 43 0 26 0 0 0 0 2 26 0 26 0 26 2 26 2
St. Joseph's - Hamilton 2272 228 1414 0 0 4 4 40 1414 13 1414 0 0 11 0 0 1414 24 1414 71 1414 73 0 0
Sault Area Hospital 201 41 201 0 0 1 1 0 201 11 65 0 1 5 0 0 65 1 65 1 65 4 65 5
Province of Ontario 14210 1548 7068 7 2 11 18 82 7067 80 5162 0 2 17 0 60 5162 89 5167 307 5167 369 3754 167
Manitoba 1504 220 1183 0 0 2 2 0 1183 13 118 1 2 5 0 0 118 2 142 4 118 21 142 4
Saskatchewan 2253 226 773 0 0 2 2 1 734 25 306 2 5 6 1 0 307 14 307 4 307 56 306 16
Alberta 4989 435 2882 9 1 1 11 47 2655 29 1110 11 5 26 7 0 1109 19 1109 50 1100 122 1110 26
Prairies 8746 881 4838 9 1 5 15 48 4572 67 1534 14 12 37 8 0 1534 35 1558 58 1525 199 1558 46
British Columbia 3939 582 3276 1 1 0 16 29 3116 111 613 2 2 26 1 0 613 28 613 41 589 89 589 29
Yukon 53 5 34 0 0 0 0 2 34 5 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Northwest Territories 24 2 21 0 0 0 0 0 21 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 21 5 N.C. N.C.
Nunavut N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Territories 77 7 55 0 0 0 0 2 55 5 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 21 5 N.C. N.C.
CANADA 48292 5462 23518 23 4 103 142 300 20930 405 8406 24 18 129 12 60 8419 214 8437 452 7758 717 6999 316

The data in the RVDSS report represent surveillance data available at the time of writing. Data missing from the current week are denoted by N.R. Data not collected by reporting lab denoted by N.C.

Some specimens from Yukon (YT) are sent to reference laboratories in British Columbia and reported results reflect specimens identified as originating from YT.

Results from British Columbia comprise of specimens from the following sites: Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Vancouver Coastal Health sites, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites and Northern Health Authority sites.

Due to different testing protocols of laboratories across Canada, influenza A subtype detection counts may not be included in total influenza A detection counts. Total influenza A and B positive counts are used to calculate percentage of tests positive.

Delays in the reporting of data may cause data to change retrospectively.

Table 2: Cumulative respiratory virus detections from August 28, 2022 to March 25, 2023 (surveillance weeks 2022-35 to 2023-12)
Reporting Laboratory SARS-CoV-2 Tested SARS-CoV-2 Positive Flu Tested A(H1)pdm09 Positive A(H3) Positive A(UnS) Positive Total Flu A Positive Total Flu B Positive RSV Tested RSV Positive HPIV Tested HPIV 1 Positive HPIV 2 Positive HPIV 3 Positive HPIV 4 Positive Other HPIV Positive ADV Tested ADV Positive HMPV Tested HMPV Positive EV/RV Tested EV/RV Positive HCoV Tested HCoV Positive
Newfoundland 17365 3284 9799 1 246 670 917 4 9799 430 9799 30 30 243 35 0 9799 198 9799 328 9799 792 9799 368
Prince Edward Island 30179 6838 3392 1 119 245 365 2 3392 356 1082 16 25 78 6 0 1082 66 1082 35 1082 326 1082 31
Nova Scotia 117021 23299 35138 0 4 3614 3618 5 35128 2335 1121 5 16 28 3 0 1127 41 1117 34 1127 211 1127 45
New Brunswick 99920 14861 42509 12 133 4424 4569 10 34634 2002 3004 7 24 139 7 0 3004 213 3004 144 3004 542 2949 187
Atlantic 264485 48282 90838 14 502 8953 9469 21 82953 5123 15006 58 95 488 51 0 15012 518 15002 541 15012 1871 14957 631
Région Nord-Est 77874 9788 43466 0 4 3753 3757 35 13898 1322 1168 15 4 71 0 0 1169 87 1160 78 N.C. N.C. 1169 80
Québec-Chaudière-Appalaches 167983 16486 21793 0 0 2827 2827 28 21224 1855 6045 22 5 66 2 0 6432 496 6045 304 N.C. N.C. 6045 286
Centre-du-Québec 132656 18567 13834 0 0 1757 1757 31 12101 926 832 13 0 38 2 0 832 94 832 65 N.C. N.C. 832 60
Montréal-Laval 183905 23478 82514 0 9 6133 6142 567 44259 2582 18336 126 17 379 13 0 18345 815 18464 690 N.C. N.C. 18021 661
Ouest du Québec 102320 13601 19810 0 7 2181 2188 52 17634 1269 901 20 0 63 1 0 900 172 901 55 N.C. N.C. 902 51
Montérégie 128119 14965 21467 0 0 1680 1680 52 20229 1103 120 0 0 2 0 0 120 4 120 6 N.C. N.C. 120 3
Province of Québec 792857 96885 202884 0 20 18331 18351 765 129345 9057 27402 196 26 619 18 0 27798 1668 27522 1198 N.C. N.C. 27089 1141
P.H.O.L. - Ottawa 26902 6780 4772 17 136 66 214 1 4772 351 3339 0 0 0 0 71 3339 14 3339 94 3339 300 3339 136
EORLA 78403 8059 13941 0 0 1395 1395 9 13941 1270 1127 9 3 46 16 0 1127 51 1127 51 1127 256 1127 74
P.H.O.L. - Kingston 27295 4566 2499 2 92 38 132 1 2498 177 2021 0 0 0 0 79 2022 27 2022 47 2021 257 2022 67
UHN / Mount Sinai Hospital 86131 6587 19334 6 43 346 395 29 19334 292 1813 0 2 15 1 0 1780 6 1813 14 1813 58 1813 76
P.H.O.L. - Toronto 48427 10351 23489 103 2402 144 1111 16 23459 1279 20508 0 0 0 0 797 20512 366 20508 540 20508 1816 20508 918
Sick Kids Hospital - Toronto 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Shared Hospital Laboratory 74152 5375 74153 102 1465 724 2291 123 74154 2180 51386 4 0 16 0 551 51399 495 51653 676 51601 1719 51493 814
P.H.O.L. - Sault Ste. Marie 1651 325 625 1 52 15 58 0 625 23 557 0 0 0 0 51 557 4 557 30 557 35 557 40
P.H.O.L. - Timmins 8483 821 932 0 161 6 156 0 930 96 887 0 0 0 0 51 887 12 887 19 887 78 887 37
St. Joseph's - London 113617 14410 17055 0 0 883 883 38 17055 999 1777 0 0 0 0 62 1811 62 1811 41 1811 263 1399 80
P.H.O.L. - London 33774 7310 9780 11 584 63 640 12 9779 872 7775 0 0 0 0 363 7776 100 7776 140 7775 712 7776 271
P.H.O.L. - Orillia 532 250 2105 6 261 23 290 5 2105 226 2032 0 0 0 0 117 2032 42 2032 65 2032 289 2032 94
P.H.O.L. - Thunder Bay 7965 1615 939 0 107 3 110 0 938 96 827 0 0 0 0 33 827 17 827 17 827 84 828 27
P.H.O.L. - Sudbury 1941 297 709 1 65 14 67 0 709 70 599 0 0 0 0 28 599 7 599 33 599 34 599 23
P.H.O.L. - Hamilton 23870 6410 7961 7 300 92 399 19 7958 530 5765 0 0 0 0 219 5767 100 5765 135 5765 540 5765 228
P.H.O.L. - Peterborough 4685 912 1233 0 67 11 78 2 1233 113 956 0 0 0 0 31 956 12 956 35 956 131 956 35
St. Joseph's - Hamilton 86426 12684 39102 0 0 2707 2707 131 39102 2251 39102 0 0 919 0 0 39102 435 39102 625 39102 2623 0 0
Sault Area Hospital 11669 2044 7585 1 262 258 521 0 7585 145 2335 35 3 59 4 0 2335 40 2335 92 2335 219 2335 65
Province of Ontario 635923 88796 226214 257 5997 6788 11447 386 226177 10970 142806 48 8 1055 21 2453 142828 1790 143109 2654 143055 9414 103436 2985
Manitoba 60868 10439 33892 16 202 1773 1991 8 33892 1696 4642 12 11 161 6 0 4632 121 4823 193 4642 665 4823 193
Saskatchewan 150060 12083 36051 2 41 3859 3902 22 28524 2151 11898 53 54 507 11 0 11901 298 11903 618 11901 1150 11896 416
Alberta 206834 31043 109305 957 7292 2797 11046 280 95493 7551 38089 255 81 825 49 0 38075 494 38032 1100 37430 3430 38089 1023
Prairies 417762 53565 179248 975 7535 8429 16939 310 157909 11398 54629 320 146 1493 66 0 54608 913 54758 1911 53973 5245 54808 1632
British Columbia 209179 21100 111673 374 4350 301 8844 187 104558 7894 23855 170 175 908 146 6 23843 625 23843 831 23101 3604 23098 921
Yukon 4802 365 755 2 136 0 138 7 753 52 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Northwest Territories 1501 180 1359 2 147 1 150 1 1359 97 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 1359 275 N.C. N.C.
Nunavut 3833 360 1961 3 230 3 236 14 1961 66 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Territories 10136 905 4075 7 513 4 524 22 4073 215 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 1359 275 N.C. N.C.
CANADA 2330342 309533 814932 1627 18917 42806 65574 1691 705015 44657 263698 792 450 4563 302 2459 264089 5514 264234 7135 236500 20409 223388 7310

The data in the RVDSS report represent surveillance data available at the time of writing. Data not collected by reporting lab denoted by N.C.

Some specimens from Yukon (YT) are sent to reference laboratories in British Columbia and reported results reflect specimens identified as originating from YT.

Results from British Columbia comprise of specimens from the following sites: Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Vancouver Coastal Health sites, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites and Northern Health Authority sites.

Due to different testing protocols of laboratories across Canada, influenza A subtype detection counts may not be included in total influenza A detection counts. Total influenza A and B positive counts are used to calculate percentage of tests positive.

Delays in the reporting of data may cause data to change retrospectively. Due to these delays, the sum of weekly report totals do not add up to cumulative totals.

Positive respiratory virus tests historical comparison

Figure 1: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza, and respiratory syncytial virus tests (%) reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season

Figure 1

Shaded area represents the maximum and minimum % of respiratory virus tests positive reported by week from seasons 2014-2015 to 2019-2020

Note: Changes to testing practices during the COVID-19 pandemic may cause substantial changes to indicator estimates from previous years. Collection of laboratory testing practice meta-data to understand these changes is ongoing. Interpret trends with caution.

Note: SARS-CoV-2 surveillance was integrated into RVDSS at the beginning of the 2022-2023 season; no appropriate data is available for historical comparison.

Note: Data from week 11 of the 2019-2020 season onwards are excluded from the historical comparison due to the COVID-19 pandemic.

Figure 1: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza, and respiratory syncytial virus tests (%) reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season
Week Week end 2022-2023 SARS-CoV-2% 2022-2023 A% 2021-2022 A% 2020-2021 A% Max A% Base Min A% Base Av A% Base 2022-2023 B% 2021-2022 B% 2020-2021 B% Max B% Base Min B% Base Av B% Base 2022-2023 RSV% 2021-2022 RSV% 2020-2021 RSV% Max RSV% Base Min RSV% Base Av RSV% Base
35 2022-09-03 13.40 0.18 0.04 0.00 1.60 0.11 0.68 0.02 0.00 0.02 0.28 0.00 0.13 1.14 4.43 0.02 1.34 0.38 0.60
36 2022-09-10 13.07 0.14 0.01 0.00 2.11 0.23 0.98 0.04 0.00 0.00 0.55 0.00 0.15 1.12 6.61 0.04 1.09 0.22 0.57
37 2022-09-17 12.73 0.24 0.03 0.00 1.59 0.36 0.87 0.01 0.00 0.00 0.19 0.04 0.12 1.05 7.59 0.02 1.37 0.31 0.64
38 2022-09-24 13.61 0.48 0.00 0.02 2.15 0.43 1.16 0.02 0.00 0.00 0.21 0.00 0.14 1.40 7.16 0.10 1.24 0.37 0.64
39 2022-10-01 14.45 0.68 0.01 0.00 2.65 0.57 1.53 0.03 0.00 0.00 0.29 0.09 0.18 2.11 8.48 0.05 1.29 0.41 0.68
40 2022-10-08 15.06 0.99 0.00 0.00 2.17 1.01 1.58 0.03 0.02 0.00 0.20 0.05 0.11 2.44 8.53 0.07 1.39 0.34 0.67
41 2022-10-15 16.58 1.44 0.03 0.01 2.66 1.05 1.57 0.01 0.03 0.00 0.36 0.03 0.16 3.52 9.54 0.10 1.74 0.58 0.98
42 2022-10-22 15.39 2.39 0.03 0.00 2.96 0.77 1.92 0.05 0.02 0.00 0.45 0.05 0.25 4.56 8.18 0.07 2.11 0.63 1.14
43 2022-10-29 15.78 5.54 0.03 0.01 5.23 0.68 2.60 0.03 0.02 0.00 0.55 0.06 0.23 6.59 8.11 0.07 2.16 0.55 1.32
44 2022-11-05 13.91 10.91 0.10 0.04 8.42 1.08 3.39 0.03 0.10 0.03 0.71 0.12 0.31 7.63 7.82 0.05 3.35 0.83 1.92
45 2022-11-12 12.43 16.20 0.07 0.02 9.83 1.18 4.19 0.04 0.06 0.02 0.97 0.22 0.44 7.54 7.03 0.04 4.43 1.29 2.59
46 2022-11-19 11.97 20.15 0.10 0.03 13.95 1.42 5.47 0.05 0.06 0.01 1.49 0.09 0.58 7.51 7.18 0.06 6.33 1.38 3.29
47 2022-11-26 11.76 24.06 0.13 0.03 15.24 1.25 6.91 0.04 0.07 0.04 2.13 0.13 0.80 6.65 8.10 0.03 8.69 1.79 4.46
48 2022-12-03 12.12 23.83 0.19 0.04 18.07 0.76 9.40 0.03 0.15 0.01 3.18 0.08 1.20 6.93 8.92 0.02 9.47 3.11 5.72
49 2022-12-10 12.63 20.95 0.23 0.03 19.52 1.43 11.41 0.06 0.05 0.01 4.21 0.19 1.60 7.36 10.09 0.06 12.26 4.87 7.12
50 2022-12-17 13.10 17.20 0.23 0.01 26.42 1.97 14.27 0.07 0.02 0.01 7.95 0.15 2.55 8.71 10.78 0.07 13.19 5.39 7.93
51 2022-12-24 14.15 12.50 0.18 0.00 28.53 2.27 16.81 0.05 0.02 0.01 10.44 0.19 3.30 9.26 8.97 0.07 15.23 6.52 9.27
52 2022-12-31 15.61 7.97 0.09 0.00 33.97 3.30 20.41 0.07 0.01 0.00 12.73 0.23 4.07 10.69 6.72 0.01 17.80 6.83 10.39
1 2023-01-07 15.09 4.59 0.08 0.00 30.93 4.58 19.55 0.07 0.00 0.00 10.34 0.22 3.86 10.40 5.26 0.04 15.62 7.12 10.17
2 2023-01-14 13.41 2.24 0.11 0.00 26.80 5.46 19.10 0.05 0.01 0.00 11.01 0.29 3.91 9.12 4.32 0.07 14.05 6.60 9.63
3 2023-01-21 12.26 1.39 0.04 0.01 28.20 9.13 18.94 0.14 0.01 0.01 12.75 0.35 4.69 8.47 3.42 0.03 15.56 6.72 10.32
4 2023-01-28 11.35 0.91 0.05 0.00 27.01 12.34 18.81 0.15 0.00 0.00 12.74 0.41 5.15 7.97 2.33 0.05 15.88 7.02 11.23
5 2023-02-04 11.56 0.75 0.03 0.00 23.66 15.78 19.14 0.28 0.01 0.00 14.84 0.41 5.76 7.18 2.19 0.04 16.33 7.17 11.49
6 2023-02-11 11.92 0.68 0.04 0.02 23.36 15.63 18.79 0.34 0.01 0.00 16.23 0.44 6.21 5.79 2.10 0.08 15.79 6.52 11.70
7 2023-02-18 11.78 0.55 0.02 0.00 24.22 15.48 18.52 0.29 0.00 0.00 17.02 0.35 6.54 5.13 2.16 0.02 15.53 6.95 11.26
8 2023-02-25 11.78 0.57 0.06 0.00 28.62 12.42 18.53 0.50 0.02 0.00 16.79 0.45 6.60 4.54 2.12 0.05 15.47 6.64 10.63
9 2023-03-04 11.19 0.63 0.12 0.00 29.30 11.04 18.35 0.70 0.00 0.00 15.45 0.74 6.24 3.73 2.50 0.01 15.62 6.54 10.04
10 2023-03-11 11.45 0.62 0.16 0.00 29.65 8.51 16.81 0.78 0.00 0.00 14.86 0.81 6.41 2.82 3.10 0.00 14.97 6.35 9.37
11 2023-03-18 11.59 0.53 0.26 0.01 24.27 6.74 14.55 1.14 0.01 0.00 13.11 1.05 6.86 2.18 3.71 0.03 12.11 6.29 8.83
12 2023-03-25 11.31 0.60 0.86 0.00 20.91 5.51 12.67 1.28 0.00 0.00 11.53 1.51 7.43 1.94 3.79 0.07 10.70 6.46 8.12
Figure 2: Positive tests (%) of other respiratory viruses reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season

Figure 2

Shaded area represents the maximum and minimum % of respiratory virus tests positive reported by week from seasons 2014-2015 to 2019-2020

Note: Changes to testing practices during the COVID-19 pandemic may cause substantial changes to indicator estimates from previous years. Collection of laboratory testing practice meta-data to understand these changes is ongoing. Interpret trends with caution.

Note: Data from week 11 of the 2019-2020 season onwards are excluded from the historical comparison due to the COVID-19 pandemic.

Note: % Tests Positive scale changes across the dashed line

Figure 2: Positive tests (%) of other respiratory viruses reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season
Week Week end 2022-2023 EV/RV% 2021-2022 EV/RV% 2020-2021 EV/RV% Max EV/RV% Base Min EV/RV% Base Av EV/RV% Base 2022-2023 HPIV% 2021-2022 HPIV% 2020-2021 HPIV% Max HPIV% Base Min HPIV% Base Av HPIV% Base 2022-2023 ADV% 2021-2022 ADV% 2020-2021 ADV% Max ADV% Base Min ADV% Base Av ADV% Base 2022-2023 HMPV% 2021-2022 HMPV% 2020-2021 HMPV% Max HMPV% Base Min HMPV% Base Av HMPV% Base 2022-2023 HCoV% 2021-2022 HCoV% 2020-2021 HCoV% Max HCoV% Base Min HCoV% Base Av HCoV% Base
35 2022-09-03 15.47 21.96 9.07 27.19 22.44 24.78 2.80 5.99 0.08 3.16 1.15 2.42 2.28 1.18 0.27 1.74 0.99 1.43 1.80 0.23 0.17 2.04 0.10 0.77 0.53 1.05 0.06 0.76 0.18 0.45
36 2022-09-10 16.22 18.59 8.13 30.69 23.30 26.31 3.21 4.93 0.20 3.31 1.35 2.32 2.19 1.15 0.40 2.85 1.42 1.87 1.81 0.24 0.06 0.84 0.10 0.48 0.38 0.62 0.00 0.38 0.12 0.22
37 2022-09-17 21.73 27.46 8.07 33.58 27.74 31.68 3.02 5.97 0.13 3.26 1.65 2.40 2.10 0.81 0.35 2.44 1.38 1.86 1.38 0.17 0.05 1.61 0.00 0.51 0.28 0.44 0.05 0.56 0.00 0.26
38 2022-09-24 23.50 33.19 15.67 39.57 32.80 35.33 2.40 4.73 0.07 2.87 1.92 2.33 1.59 0.82 0.58 2.04 1.11 1.63 1.61 0.37 0.02 1.43 0.06 0.47 0.32 0.67 0.00 1.36 0.06 0.43
39 2022-10-01 22.89 30.01 24.12 40.59 34.87 37.68 3.10 8.12 0.02 3.01 1.70 2.24 2.21 1.14 0.19 2.27 1.04 1.66 1.43 0.17 0.04 0.72 0.05 0.28 0.59 0.62 0.05 0.66 0.07 0.45
40 2022-10-08 19.32 26.26 16.62 41.29 33.00 35.43 3.70 8.19 0.02 3.28 1.90 2.43 1.80 1.31 0.44 2.25 1.39 1.82 1.43 0.16 0.00 0.92 0.05 0.34 0.93 0.57 0.09 1.08 0.22 0.58
41 2022-10-15 16.70 22.91 15.48 33.62 26.94 29.81 3.52 10.46 0.06 3.70 1.94 2.74 2.03 1.37 0.37 1.91 1.28 1.70 1.66 0.20 0.19 0.95 0.04 0.46 1.00 1.69 0.02 0.70 0.00 0.33
42 2022-10-22 12.95 22.16 13.60 32.62 24.54 27.82 4.21 10.01 0.06 3.89 2.64 3.20 1.67 2.54 0.47 2.38 1.47 1.86 1.59 0.15 0.06 0.89 0.15 0.38 1.16 1.07 0.00 1.18 0.20 0.49
43 2022-10-29 11.05 19.64 13.14 28.73 21.67 24.95 4.41 9.38 0.07 3.98 3.18 3.56 1.79 1.15 0.37 2.42 1.63 1.96 1.78 0.36 0.02 1.64 0.12 0.57 1.86 1.05 0.00 2.35 0.27 0.75
44 2022-11-05 10.23 21.45 9.23 23.82 16.75 21.34 4.14 10.28 0.03 4.81 2.94 3.70 2.02 1.42 0.22 2.88 1.18 2.20 1.79 0.77 0.13 1.08 0.23 0.47 2.54 2.21 0.00 2.59 0.21 0.88
45 2022-11-12 7.77 22.39 9.70 23.08 15.17 20.56 3.90 9.97 0.01 5.42 2.53 4.01 1.99 1.63 0.33 2.68 2.02 2.42 2.06 0.64 0.01 1.30 0.04 0.77 3.00 2.57 0.03 2.74 0.52 0.96
46 2022-11-19 6.93 21.37 9.02 22.77 15.28 19.27 3.97 8.29 0.04 5.72 1.62 4.19 1.87 2.51 0.30 2.90 1.99 2.53 1.89 0.99 0.04 1.43 0.18 0.79 3.54 2.99 0.03 3.32 0.46 1.25
47 2022-11-26 4.88 18.54 8.44 20.84 12.15 16.09 3.63 7.04 0.06 7.00 2.36 4.72 1.89 1.94 0.32 2.95 1.83 2.35 1.78 1.01 0.02 2.02 0.09 0.89 3.24 3.90 0.04 3.26 0.37 1.25
48 2022-12-03 4.74 16.64 7.94 16.72 12.69 13.83 3.04 5.78 0.02 6.14 3.03 4.18 1.87 1.89 0.35 3.34 1.66 2.48 1.86 1.48 0.02 1.94 0.31 1.08 3.94 4.94 0.02 4.30 1.00 2.04
49 2022-12-10 4.09 14.57 6.21 16.32 10.72 13.07 3.03 3.97 0.00 5.65 2.94 4.19 1.68 2.48 0.54 3.03 1.84 2.49 1.93 1.22 0.05 2.80 0.49 1.46 4.48 6.58 0.05 5.19 0.84 2.52
50 2022-12-17 4.58 12.40 6.62 13.85 8.43 10.90 2.98 3.23 0.06 5.95 2.54 4.27 2.29 2.72 0.51 3.27 1.49 2.45 1.92 1.08 0.02 3.32 0.46 1.70 5.13 7.26 0.11 6.04 1.54 3.16
51 2022-12-24 4.49 9.95 5.65 14.18 8.81 10.48 3.09 3.01 0.04 6.71 2.94 3.95 1.76 2.54 0.58 3.20 1.36 2.04 2.23 1.20 0.04 4.39 0.37 2.44 5.28 8.11 0.05 6.68 1.87 3.72
52 2022-12-31 4.50 7.71 6.53 14.41 6.24 9.23 3.32 2.13 0.03 5.08 2.87 3.75 1.80 1.92 0.48 2.59 1.20 1.76 2.75 1.00 0.11 3.81 0.41 2.44 4.73 10.33 0.07 6.73 2.78 4.75
1 2023-01-07 4.19 5.71 5.43 11.09 4.36 7.42 3.63 1.84 0.12 5.08 2.68 3.34 1.88 1.84 0.81 2.67 0.85 1.54 2.94 0.72 0.06 4.45 0.28 2.70 4.40 9.27 0.12 7.77 3.07 5.16
2 2023-01-14 4.71 3.98 5.18 9.55 4.31 6.79 3.24 1.19 0.08 4.12 2.46 3.05 1.87 1.13 0.82 2.15 0.87 1.37 2.61 0.38 0.03 4.76 0.42 2.66 4.01 7.46 0.16 7.89 2.84 5.44
3 2023-01-21 6.68 3.12 3.56 8.42 4.44 6.01 2.92 0.76 0.05 3.25 2.59 2.82 1.97 1.34 0.40 2.10 1.15 1.45 2.56 0.24 0.11 5.56 0.47 3.13 3.46 4.97 0.26 7.90 4.17 6.11
4 2023-01-28 8.22 2.60 3.87 9.04 4.89 6.41 2.78 0.64 0.06 3.12 1.77 2.55 2.35 1.18 0.46 1.83 1.11 1.49 2.71 0.23 0.12 5.19 0.55 3.01 2.63 3.92 0.16 7.86 3.79 6.08
5 2023-02-04 8.94 3.02 4.76 9.79 6.06 6.94 2.70 0.48 0.06 3.48 1.70 2.39 2.44 1.57 0.29 1.93 1.36 1.62 2.96 0.25 0.16 5.70 0.58 3.29 3.20 2.83 0.13 8.49 4.55 6.84
6 2023-02-11 9.97 3.86 5.08 9.89 6.16 6.98 2.67 0.51 0.10 2.89 1.57 2.19 2.14 1.44 0.54 1.74 1.25 1.51 3.73 0.42 0.19 5.57 0.65 3.39 2.64 3.01 0.20 8.57 3.48 6.75
7 2023-02-18 9.87 4.46 5.56 8.95 6.00 7.02 2.63 0.44 0.00 3.20 1.42 2.12 2.31 1.52 0.49 1.61 1.30 1.51 4.41 0.44 0.14 6.05 1.45 3.94 3.14 3.24 0.13 8.02 4.35 6.54
8 2023-02-25 9.55 6.31 4.77 8.35 5.20 6.94 2.55 0.73 0.16 3.21 1.31 2.25 2.86 1.85 0.72 2.00 1.38 1.67 4.29 0.53 0.04 5.74 1.19 4.08 3.06 3.67 0.14 8.29 4.21 6.60
9 2023-03-04 9.78 7.80 5.48 9.04 5.73 7.75 3.06 0.60 0.07 3.35 1.41 2.44 2.75 1.90 0.86 1.92 1.09 1.40 4.73 0.40 0.11 6.42 1.87 4.38 3.41 3.32 0.36 8.01 5.09 6.86
10 2023-03-11 9.42 8.24 4.62 10.16 5.55 8.08 2.77 0.68 0.06 4.18 1.19 2.69 2.79 1.98 0.38 2.23 1.50 1.78 5.04 0.51 0.00 6.74 2.26 4.80 3.70 3.86 0.34 8.34 4.28 7.01
11 2023-03-18 8.77 8.97 4.08 9.45 7.15 8.24 3.48 0.66 0.19 4.58 1.35 3.00 2.39 1.88 0.63 2.32 1.23 1.69 5.07 0.59 0.11 7.94 2.52 4.71 3.70 3.25 0.33 8.02 4.35 6.23
12 2023-03-25 9.24 9.52 4.61 10.26 8.71 9.66 2.89 1.05 0.00 4.95 1.26 3.34 2.54 1.71 0.35 2.13 1.84 1.97 5.36 0.77 0.14 6.69 3.65 5.19 4.51 4.38 0.54 6.99 3.95 5.69

Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests

Figure 3: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests (%) in Canada by region by surveillance week
Figure 3

Note: Differences in positivity between jurisdictions can reflect differences in testing practices. Please interpret with caution.

Figure 3: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests (%) in Canada by region by surveillance week
Week Week end Can Tests SARS-CoV-2% Atl Tests SARS-CoV-2% QC Tests SARS-CoV-2% ON Tests SARS-CoV-2% Pr Tests SARS-CoV-2% BC Tests SARS-CoV-2% Terr Tests SARS-CoV-2%
35 2022-09-03 95312 13.40 10317 23.39 26519 12.26 28978 12.71 14414 16.11 14523 7.27 561 9.27
36 2022-09-10 88007 13.07 9220 22.81 25637 12.40 25742 12.04 13370 15.42 13642 7.44 396 10.86
37 2022-09-17 94363 12.73 9788 18.93 26091 12.17 28069 12.72 14241 16.20 15727 6.70 447 13.20
38 2022-09-24 96287 13.61 9345 24.14 26931 13.36 28977 12.35 15042 16.85 15532 6.99 460 10.43
39 2022-10-01 92675 14.45 8311 23.17 29662 13.22 27909 13.57 14884 17.55 11511 9.65 398 7.79
40 2022-10-08 95462 15.06 11290 20.91 31745 13.44 30640 14.46 14766 16.55 6525 13.01 496 6.05
41 2022-10-15 93092 16.58 9618 27.02 32473 13.37 28633 17.02 15441 17.70 6458 13.35 469 5.76
42 2022-10-22 95270 15.39 11962 20.72 32792 12.10 26742 17.29 16894 16.80 6521 11.13 359 7.24
43 2022-10-29 94756 15.78 9563 21.97 33446 11.75 25142 19.65 20195 16.34 5991 10.82 419 8.11
44 2022-11-05 89782 13.91 8906 17.97 32692 11.30 23508 16.57 17710 15.27 6497 8.56 469 8.74
45 2022-11-12 89643 12.43 10513 14.36 31704 10.58 22024 13.83 18372 13.92 6651 9.76 379 6.86
46 2022-11-19 90476 11.97 10650 13.65 30751 11.13 21425 12.63 20655 12.41 6640 9.79 355 7.61
47 2022-11-26 93875 11.76 11661 13.65 33538 11.43 20744 11.77 20339 11.72 7236 10.50 357 8.68
48 2022-12-03 94410 12.12 12354 13.22 35547 12.95 20852 11.38 18486 11.58 6818 9.78 353 7.65
49 2022-12-10 93753 12.63 13445 13.82 34889 13.37 21193 12.30 16624 10.88 7198 12.25 404 4.46
50 2022-12-17 89983 13.10 11781 13.87 34271 14.24 20346 13.88 16279 10.13 6965 10.73 341 14.08
51 2022-12-24 78912 14.15 10225 15.87 30937 14.58 18610 15.78 13249 10.30 5579 12.56 312 9.94
52 2022-12-31 69932 15.61 8458 19.43 25554 15.29 18079 17.14 11699 11.99 5877 14.45 265 6.79
1 2023-01-07 75195 15.09 9934 18.10 24748 13.67 20785 17.96 13420 11.46 5974 14.16 334 13.77
2 2023-01-14 71607 13.41 9630 17.07 22640 12.05 19450 15.40 13853 10.63 5694 12.93 340 8.53
3 2023-01-21 65814 12.26 8435 17.29 21828 10.70 18101 14.33 12528 9.01 4637 11.47 285 8.42
4 2023-01-28 59464 11.35 6656 17.86 19478 9.48 17201 13.27 11564 8.86 4313 9.07 252 6.35
5 2023-02-04 56552 11.56 5958 18.95 18579 10.53 16669 12.57 10944 8.89 4144 8.93 258 5.81
6 2023-02-11 55878 11.92 6104 18.18 19683 11.59 16025 12.38 9663 8.42 4144 10.71 259 9.65
7 2023-02-18 54615 11.78 5613 17.66 19596 11.17 15744 12.81 9276 8.13 4179 10.91 207 14.49
8 2023-02-25 52129 11.78 4878 18.63 19200 11.20 14836 12.15 8749 8.55 4259 11.86 207 13.53
9 2023-03-04 53286 11.19 5550 16.85 19339 10.82 15219 11.39 8874 8.70 4055 10.09 249 9.64
10 2023-03-11 51026 11.45 4959 18.33 18106 10.52 14995 11.34 8622 9.75 4122 11.28 222 10.81
11 2023-03-18 50494 11.59 4754 17.37 17768 10.25 15075 11.90 8863 10.05 3828 13.01 206 9.71
12 2023-03-25 48292 11.31 4607 16.21 16713 10.15 14210 10.89 8746 10.07 3939 14.78 77 9.09

Positive influenza (Flu) tests

Figure 4: Positive influenza (Flu) tests (%) in Canada by region by surveillance week
Figure 4
Figure 4: Positive influenza (Flu) tests (%) in Canada by region by surveillance week
Week Week end Can Tests Can A% Can B% Atl Tests Atl A% Atl B% QC Tests QC A% QC B% ON Tests ON A% ON B% Pr Tests Pr A% Pr B% BC Tests BC A% BC B% Terr Tests Terr A% Terr B%
35 2022-09-03 12769 0.18 0.02 932 0.11 0.11 2404 0.17 0.04 4663 0.11 0.00 2649 0.34 0.04 2006 0.20 0.00 115 0.00 0.00
36 2022-09-10 12637 0.14 0.04 906 0.00 0.00 2520 0.12 0.00 4411 0.16 0.02 2659 0.15 0.08 2055 0.19 0.10 86 0.00 0.00
37 2022-09-17 13539 0.24 0.01 854 0.12 0.00 2618 0.19 0.04 4801 0.31 0.02 2897 0.17 0.00 2247 0.22 0.00 122 0.82 0.00
38 2022-09-24 14521 0.48 0.02 788 0.13 0.00 2714 0.22 0.04 5515 0.38 0.00 3144 0.41 0.03 2226 1.21 0.04 134 1.49 0.00
39 2022-10-01 14943 0.68 0.03 688 0.29 0.15 2873 0.21 0.10 5624 0.66 0.02 3234 0.62 0.00 2411 1.33 0.00 113 3.54 0.00
40 2022-10-08 14585 0.99 0.03 818 0.24 0.00 2339 0.21 0.00 5676 1.02 0.05 3181 0.88 0.03 2430 1.85 0.00 141 4.26 0.00
41 2022-10-15 16307 1.44 0.01 776 1.68 0.00 3275 0.49 0.00 5761 1.89 0.00 3829 0.97 0.03 2540 1.85 0.00 126 10.32 0.00
42 2022-10-22 17826 2.39 0.05 1001 2.60 0.00 3608 0.86 0.03 6230 3.10 0.08 4101 2.12 0.02 2774 2.45 0.07 112 18.75 0.00
43 2022-10-29 18556 5.54 0.03 969 3.72 0.00 3821 1.41 0.08 6013 8.13 0.02 4567 6.90 0.00 3026 3.34 0.07 160 20.63 0.00
44 2022-11-05 21669 10.91 0.03 1209 8.02 0.00 4458 3.45 0.02 7006 11.28 0.04 5715 17.76 0.02 3111 8.07 0.06 170 33.53 0.00
45 2022-11-12 27004 16.20 0.04 2145 11.38 0.05 5731 7.47 0.07 8254 13.28 0.04 7204 27.94 0.03 3507 16.03 0.03 163 19.63 0.00
46 2022-11-19 33291 20.15 0.05 3433 14.54 0.00 6914 13.65 0.04 8727 14.32 0.07 9301 30.99 0.05 4741 23.52 0.04 175 10.86 0.00
47 2022-11-26 40370 24.06 0.04 5140 24.20 0.00 9252 22.84 0.06 9193 16.41 0.03 10338 30.32 0.01 6279 26.74 0.10 168 19.64 0.00
48 2022-12-03 44029 23.83 0.03 6393 27.94 0.02 12431 26.91 0.06 9930 16.05 0.02 9751 24.78 0.03 5334 24.07 0.00 190 34.74 0.00
49 2022-12-10 45446 20.95 0.06 7404 28.55 0.00 12616 25.12 0.13 10560 13.10 0.06 8800 18.65 0.02 5819 19.02 0.07 247 42.51 0.00
50 2022-12-17 44356 17.20 0.07 6554 23.25 0.00 13081 21.57 0.15 10525 10.56 0.02 8264 14.41 0.01 5731 16.18 0.10 201 27.36 0.00
51 2022-12-24 40210 12.50 0.05 5487 16.93 0.00 11742 17.27 0.09 9666 6.57 0.03 8008 9.67 0.01 5122 12.16 0.10 185 19.46 0.00
52 2022-12-31 38348 7.97 0.07 4924 9.36 0.00 10677 12.04 0.14 9370 4.30 0.09 7758 6.38 0.04 5477 7.23 0.04 142 11.97 0.00
1 2023-01-07 39868 4.59 0.07 5460 4.93 0.00 10659 6.90 0.14 10122 3.03 0.08 8311 3.22 0.00 5152 4.54 0.12 164 9.15 0.00
2 2023-01-14 35461 2.24 0.05 4291 2.47 0.02 8879 3.47 0.08 9531 1.29 0.08 7952 1.84 0.01 4646 2.17 0.02 162 5.56 0.00
3 2023-01-21 31232 1.39 0.14 3858 1.17 0.03 8035 2.50 0.25 8462 0.79 0.05 6806 1.16 0.25 3936 1.07 0.05 135 0.00 0.00
4 2023-01-28 28799 0.91 0.15 3184 0.44 0.03 7597 1.29 0.17 8022 0.57 0.15 6332 1.01 0.21 3571 1.09 0.08 93 0.00 0.00
5 2023-02-04 28377 0.75 0.28 3221 0.25 0.00 7614 1.06 0.56 7653 0.55 0.25 6261 1.12 0.24 3527 0.37 0.09 101 0.00 0.00
6 2023-02-11 27982 0.68 0.34 3116 0.10 0.03 7619 1.00 0.45 7451 0.44 0.31 6138 1.06 0.39 3538 0.40 0.34 120 0.00 0.00
7 2023-02-18 26289 0.55 0.29 3068 0.10 0.00 6834 0.91 0.45 7239 0.23 0.18 5621 0.87 0.30 3444 0.41 0.41 83 0.00 0.00
8 2023-02-25 25448 0.57 0.50 2864 0.07 0.03 6409 1.09 0.94 7307 0.23 0.33 5235 0.67 0.44 3545 0.62 0.28 88 0.00 10.23
9 2023-03-04 26132 0.63 0.70 2917 0.31 0.07 6757 1.11 1.42 7347 0.37 0.48 5622 0.48 0.46 3373 0.77 0.53 116 0.00 4.31
10 2023-03-11 25805 0.62 0.78 2949 0.31 0.03 6864 1.18 1.35 7129 0.28 0.70 5349 0.41 0.60 3413 0.82 0.64 101 0.00 2.97
11 2023-03-18 25615 0.53 1.14 2824 0.35 0.14 6927 0.90 1.82 6958 0.36 0.86 5383 0.37 1.26 3416 0.53 0.94 107 0.00 2.80
12 2023-03-25 23518 0.60 1.28 2665 0.41 0.19 5616 1.46 2.39 7068 0.25 1.16 4838 0.31 0.99 3276 0.49 0.89 55 0.00 3.64

Positive respiratory syncytial virus (RSV) tests

Figure 5: Positive respiratory syncytial virus (RSV) tests (%) in Canada by region by surveillance week
Figure 5
Figure 5: Positive respiratory syncytial virus (RSV) tests (%) in Canada by region by surveillance week
Week Week end Can Tests RSV% Atl Tests RSV% QC Tests RSV% ON Tests RSV% Pr Tests RSV% BC Tests RSV% Terr Tests RSV%
35 2022-09-03 11585 1.14 832 1.44 1737 3.51 4663 0.54 2443 0.65 1795 0.50 115 7.83
36 2022-09-10 11442 1.12 785 0.64 1737 2.71 4411 1.00 2508 0.52 1915 0.73 86 5.81
37 2022-09-17 12331 1.05 721 0.97 1851 3.51 4801 0.60 2709 0.66 2127 0.38 122 2.46
38 2022-09-24 13335 1.40 707 1.13 1908 5.56 5515 0.98 2921 0.34 2150 0.33 134 1.49
39 2022-10-01 13629 2.11 556 3.06 2029 7.69 5623 1.35 2996 0.73 2312 0.65 113 0.88
40 2022-10-08 13346 2.44 677 2.95 1727 8.92 5675 1.92 2807 0.64 2319 0.95 141 2.13
41 2022-10-15 14337 3.52 695 3.45 2330 11.12 5761 2.46 3141 1.34 2284 1.53 126 1.59
42 2022-10-22 15783 4.56 799 3.38 2644 13.09 6230 3.60 3447 2.15 2551 1.72 112 3.57
43 2022-10-29 16274 6.59 929 4.20 2751 17.52 6010 6.09 3745 2.62 2680 3.10 159 3.14
44 2022-11-05 18915 7.63 964 6.64 3126 20.15 7006 7.09 4658 3.24 2993 3.31 168 1.79
45 2022-11-12 23546 7.54 1867 9.16 3986 16.88 8242 7.01 5898 3.49 3390 4.25 163 1.84
46 2022-11-19 27482 7.51 2538 6.82 4620 14.11 8721 7.41 7387 4.67 4041 5.99 175 2.86
47 2022-11-26 34682 6.65 4680 6.24 6170 9.98 9192 6.80 8329 5.01 6143 5.73 168 2.98
48 2022-12-03 37476 6.93 6110 5.35 8002 7.91 9926 6.85 8157 6.61 5091 8.15 190 1.58
49 2022-12-10 38234 7.36 6227 5.77 8206 6.37 10558 7.62 7504 8.49 5492 8.78 247 2.83
50 2022-12-17 37745 8.71 5921 6.67 8545 5.36 10522 8.33 7140 13.04 5416 11.48 201 2.49
51 2022-12-24 34329 9.26 4905 6.81 7661 5.33 9664 8.14 7114 13.66 4800 13.96 185 4.86
52 2022-12-31 32948 10.69 4669 7.90 6616 6.48 9370 8.19 7032 16.74 5119 15.06 142 7.04
1 2023-01-07 33446 10.40 5144 8.98 6335 6.46 10120 7.99 7536 15.96 4147 14.23 164 3.05
2 2023-01-14 30533 9.12 4078 7.41 5279 4.83 9531 7.09 7108 13.89 4375 12.75 162 4.32
3 2023-01-21 26624 8.47 3667 8.67 4553 6.50 8462 5.13 6065 12.38 3742 11.76 135 11.11
4 2023-01-28 24389 7.97 3037 7.74 4237 5.81 8022 4.62 5580 11.31 3420 13.25 93 8.60
5 2023-02-04 24100 7.18 2906 7.91 4304 5.72 7653 3.78 5758 10.04 3378 11.13 101 11.88
6 2023-02-11 24263 5.79 2953 7.42 4604 3.84 7451 3.21 5772 7.17 3363 10.20 120 10.83
7 2023-02-18 23026 5.13 2897 6.83 4209 3.64 7239 3.18 5299 6.30 3298 7.82 84 9.52
8 2023-02-25 22394 4.54 2721 6.43 4066 3.91 7307 2.29 4871 5.69 3341 6.76 88 14.77
9 2023-03-04 22960 3.73 2800 4.39 4224 3.10 7347 2.10 5269 4.29 3204 6.68 116 6.90
10 2023-03-11 22558 2.82 2843 3.13 4150 2.67 7130 1.40 5060 2.92 3274 5.19 101 18.81
11 2023-03-18 22373 2.18 2727 2.57 4216 2.21 6958 1.29 5083 1.89 3282 3.69 107 16.82
12 2023-03-25 20930 1.94 2598 2.27 3522 2.36 7067 1.13 4572 1.47 3116 3.56 55 9.09

Positive human parainfluenza virus (HPIV) tests

Figure 6: Positive human parainfluenza virus (HPIV) tests (%) in Canada by region by surveillance week
Figure 6
Figure 6: Positive human parainfluenza virus (HPIV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests HPIV% Atl Tests HPIV% QC Tests HPIV% ON Tests HPIV% Pr Tests HPIV% BC Tests HPIV%
35 2022-09-03 3433 2.80 294 0.34 619 2.75 1151 3.21 967 2.69 402 3.73
36 2022-09-10 3454 3.21 280 5.36 646 3.87 1081 2.96 1025 2.44 422 3.32
37 2022-09-17 3973 3.02 301 5.65 661 3.33 1368 3.36 1112 2.07 530 2.26
38 2022-09-24 4589 2.40 334 1.80 717 2.65 1717 2.56 1274 1.73 547 3.47
39 2022-10-01 4878 3.10 286 1.75 728 4.81 1999 3.60 1327 1.81 538 2.79
40 2022-10-08 5057 3.70 298 2.35 578 6.40 2228 2.92 1386 3.68 567 4.76
41 2022-10-15 5998 3.52 265 5.28 851 4.70 2960 3.04 1323 3.40 599 3.67
42 2022-10-22 7244 4.21 354 3.39 904 4.09 3859 3.55 1420 4.72 707 7.36
43 2022-10-29 8429 4.41 441 3.40 944 4.45 4632 3.52 1572 4.20 839 10.25
44 2022-11-05 9258 4.14 362 7.73 974 2.98 5243 2.96 1857 4.79 822 9.98
45 2022-11-12 10628 3.90 458 5.02 1103 2.81 5832 3.24 2451 4.28 783 8.43
46 2022-11-19 11671 3.97 575 5.91 1243 3.06 5943 3.30 2973 3.87 937 8.54
47 2022-11-26 12299 3.63 677 5.91 1319 3.64 5937 3.17 2644 2.91 1722 5.46
48 2022-12-03 12364 3.04 808 3.71 1439 1.88 6344 2.70 2817 3.48 956 5.23
49 2022-12-10 12670 3.03 962 3.64 1438 2.09 6470 2.43 2710 3.51 1090 6.15
50 2022-12-17 12356 2.98 988 2.94 1350 1.93 6718 2.44 2231 4.03 1069 5.52
51 2022-12-24 11701 3.09 783 3.19 1147 2.01 6638 2.65 2147 3.91 986 5.38
52 2022-12-31 11030 3.32 638 2.82 1016 2.17 6308 2.92 2063 4.36 1005 5.17
1 2023-01-07 11997 3.63 802 3.12 1017 3.24 6863 2.93 2351 4.08 964 8.30
2 2023-01-14 11015 3.24 526 3.80 828 2.17 6446 2.82 2351 3.19 864 7.18
3 2023-01-21 9972 2.92 498 4.02 849 3.06 5818 2.20 1971 4.21 836 4.07
4 2023-01-28 9363 2.78 413 2.91 813 2.58 5596 2.52 1761 2.73 780 4.87
5 2023-02-04 9383 2.70 596 3.19 788 3.05 5337 1.93 1870 3.58 792 5.05
6 2023-02-11 9047 2.67 420 5.95 816 3.19 5274 1.80 1767 3.00 770 5.58
7 2023-02-18 8811 2.63 449 4.45 860 3.72 5232 1.43 1542 4.54 728 4.81
8 2023-02-25 8628 2.55 421 5.70 795 2.77 5230 1.55 1481 3.65 701 5.56
9 2023-03-04 9016 3.06 421 9.03 788 4.44 5409 1.37 1637 5.44 761 5.26
10 2023-03-11 8553 2.77 472 9.53 766 3.13 5019 1.45 1542 3.18 754 6.10
11 2023-03-18 8475 3.48 428 10.51 764 4.32 4992 1.74 1523 5.12 768 6.77
12 2023-03-25 8406 2.89 456 9.87 641 2.65 5162 1.53 1534 4.63 613 5.06

Positive adenovirus (ADV) tests

Figure 7: Positive adenovirus (ADV) tests (%) in Canada by region by surveillance week
Figure 7
Figure 7: Positive adenovirus (ADV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests ADV% Atl Tests ADV% QC Tests ADV% ON Tests ADV% Pr Tests ADV% BC Tests ADV%
35 2022-09-03 3472 2.28 294 6.12 632 2.53 1179 0.76 965 2.69 402 2.49
36 2022-09-10 3478 2.19 280 3.57 659 3.03 1089 1.10 1028 2.43 422 2.13
37 2022-09-17 3991 2.10 301 4.65 679 3.09 1369 1.46 1111 1.35 530 2.64
38 2022-09-24 4604 1.59 334 1.20 731 3.42 1717 1.05 1275 1.41 547 1.46
39 2022-10-01 4894 2.21 286 2.80 742 4.18 2001 1.35 1327 2.11 538 2.60
40 2022-10-08 5068 1.80 298 4.03 583 5.66 2234 1.16 1386 1.23 567 0.53
41 2022-10-15 6013 2.03 265 3.77 864 4.63 2962 0.95 1323 2.12 599 2.67
42 2022-10-22 7255 1.67 354 1.98 915 4.04 3859 0.88 1420 1.69 707 2.69
43 2022-10-29 8441 1.79 441 2.04 955 5.76 4633 1.01 1572 1.97 839 1.07
44 2022-11-05 9271 2.02 362 6.08 987 5.27 5243 1.16 1857 1.99 822 1.82
45 2022-11-12 10610 1.99 458 5.46 1117 6.62 5800 1.03 2451 1.59 783 1.66
46 2022-11-19 11695 1.87 575 4.35 1265 4.66 5946 1.19 2972 1.38 937 2.45
47 2022-11-26 12290 1.89 677 3.99 1333 5.85 5937 0.94 2633 1.52 1710 1.81
48 2022-12-03 12381 1.87 808 4.33 1455 5.09 6344 1.04 2818 1.38 956 1.88
49 2022-12-10 12679 1.68 962 2.81 1450 4.69 6470 1.07 2707 1.00 1090 2.02
50 2022-12-17 12368 2.29 987 4.05 1364 6.16 6718 1.31 2230 1.70 1069 3.09
51 2022-12-24 11718 1.76 783 2.30 1161 5.51 6638 1.11 2150 1.12 986 2.64
52 2022-12-31 11030 1.80 638 2.04 1020 6.57 6308 1.08 2059 1.51 1005 1.99
1 2023-01-07 12009 1.88 802 3.74 1027 6.52 6865 1.12 2351 1.45 964 1.87
2 2023-01-14 11023 1.87 526 3.42 838 6.21 6446 1.12 2349 1.66 864 2.89
3 2023-01-21 9991 1.97 502 4.18 865 5.32 5818 1.31 1970 1.17 836 3.71
4 2023-01-28 9374 2.35 413 2.18 823 8.51 5596 1.39 1762 2.27 780 2.95
5 2023-02-04 9398 2.44 596 4.87 804 9.20 5337 1.14 1869 1.93 792 3.66
6 2023-02-11 9060 2.14 420 2.38 830 9.16 5274 1.14 1766 1.64 770 2.47
7 2023-02-18 8824 2.31 449 2.45 872 6.88 5233 1.55 1542 1.56 728 3.85
8 2023-02-25 8647 2.86 424 3.77 812 9.48 5230 1.91 1480 1.62 701 4.28
9 2023-03-04 9027 2.75 421 3.09 799 8.64 5409 1.85 1637 2.32 761 3.68
10 2023-03-11 8573 2.79 472 2.75 786 9.29 5019 1.61 1542 2.40 754 4.64
11 2023-03-18 8486 2.39 428 3.04 776 7.09 4992 1.62 1522 1.71 768 3.65
12 2023-03-25 8419 2.54 456 2.41 654 7.80 5162 1.72 1534 2.28 613 4.57

Positive human metapneumovirus (HMPV) tests

Figure 8: Positive human metapneumovirus (HMPV) tests (%) in Canada by region by surveillance week
Figure 8
Figure 8: Positive human metapneumovirus (HMPV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests HMPV% Atl Tests HMPV% QC Tests HMPV% ON Tests HMPV% Pr Tests HMPV% BC Tests HMPV%
35 2022-09-03 3492 1.80 294 2.38 619 2.91 1179 0.93 998 1.90 402 1.99
36 2022-09-10 3489 1.81 280 1.79 649 3.39 1089 0.92 1049 1.72 422 1.90
37 2022-09-17 3992 1.38 301 2.66 665 3.31 1368 0.51 1127 0.80 530 1.70
38 2022-09-24 4603 1.61 334 0.90 723 4.98 1714 0.53 1285 1.48 547 1.28
39 2022-10-01 4895 1.43 286 1.75 729 4.53 2001 0.45 1341 1.04 538 1.67
40 2022-10-08 5096 1.43 298 1.01 581 5.34 2236 0.45 1414 1.27 567 1.94
41 2022-10-15 6027 1.66 265 1.89 857 6.07 2962 0.41 1344 1.26 599 2.34
42 2022-10-22 7277 1.59 354 0.85 911 6.70 3865 0.52 1440 1.67 707 1.13
43 2022-10-29 8450 1.78 441 1.81 960 6.35 4632 0.97 1577 1.78 839 0.95
44 2022-11-05 9271 1.79 362 2.76 977 7.57 5245 0.57 1865 1.98 822 1.82
45 2022-11-12 10656 2.06 458 3.06 1123 7.84 5838 0.57 2453 2.77 783 2.04
46 2022-11-19 11676 1.89 575 3.65 1247 6.58 5955 0.27 2962 2.87 937 1.81
47 2022-11-26 12281 1.78 677 2.22 1325 6.11 5951 0.55 2618 2.02 1710 2.16
48 2022-12-03 12376 1.86 808 3.22 1440 4.17 6360 0.64 2812 2.88 956 2.30
49 2022-12-10 12530 1.93 962 3.95 1439 3.61 6474 0.85 2565 2.96 1090 1.93
50 2022-12-17 12385 1.92 987 2.84 1350 3.48 6726 0.86 2253 3.86 1069 1.68
51 2022-12-24 11712 2.23 773 3.36 1152 4.08 6652 1.05 2149 4.75 986 1.62
52 2022-12-31 11053 2.75 638 4.08 1020 3.33 6330 1.50 2060 5.92 1005 2.69
1 2023-01-07 12016 2.94 802 3.49 1018 3.24 6871 1.67 2361 5.89 964 3.94
2 2023-01-14 11046 2.61 526 3.04 831 2.77 6464 1.79 2361 4.62 864 2.78
3 2023-01-21 10031 2.56 502 2.99 854 3.16 5849 1.54 1990 4.82 836 3.47
4 2023-01-28 9404 2.71 413 2.18 813 3.32 5631 1.69 1767 5.09 780 4.36
5 2023-02-04 9432 2.96 596 4.03 792 2.15 5367 2.11 1885 4.88 792 4.17
6 2023-02-11 9062 3.73 420 5.48 817 3.67 5291 2.51 1764 5.27 770 7.66
7 2023-02-18 8821 4.41 449 9.58 861 3.25 5234 3.31 1549 5.62 728 7.97
8 2023-02-25 8642 4.29 424 5.90 797 2.13 5232 4.05 1488 4.44 701 7.28
9 2023-03-04 9015 4.73 421 5.94 791 2.53 5408 4.60 1634 4.83 761 6.96
10 2023-03-11 8563 5.04 472 5.93 768 3.13 5023 5.02 1546 3.69 754 9.42
11 2023-03-18 8504 5.07 428 7.24 770 3.64 4995 4.70 1543 4.41 768 8.98
12 2023-03-25 8437 5.36 456 5.04 643 3.58 5167 5.94 1558 3.72 613 6.69

Positive enterovirus/rhinovirus (EV/RV) tests

Figure 9: Positive enterovirus/rhinovirus (EV/RV) tests (%) in Canada by region by surveillance week
Figure 9
Figure 9: Positive enterovirus/rhinovirus (EV/RV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests EV/RV% Atl Tests EV/RV% QC Tests EV/RV% ON Tests EV/RV% Pr Tests EV/RV% BC Tests EV/RV%
35 2022-09-03 2845 15.47 294 30.27 N.A. N.A. 1179 10.18 947 16.79 394 15.48
36 2022-09-10 2817 16.22 280 21.79 N.A. N.A. 1089 11.20 1013 18.76 417 17.99
37 2022-09-17 3337 21.73 301 23.59 N.A. N.A. 1368 20.10 1101 20.62 522 24.33
38 2022-09-24 3847 23.50 334 22.16 N.A. N.A. 1689 22.20 1255 21.59 538 31.78
39 2022-10-01 4150 22.89 286 27.62 N.A. N.A. 2001 19.94 1310 22.29 521 31.67
40 2022-10-08 4488 19.32 298 20.47 N.A. N.A. 2235 15.84 1365 19.85 546 29.67
41 2022-10-15 5161 16.70 265 24.91 N.A. N.A. 2963 11.51 1305 20.15 579 28.67
42 2022-10-22 6332 12.95 354 21.47 N.A. N.A. 3863 7.77 1389 18.14 678 26.40
43 2022-10-29 7496 11.05 441 19.05 N.A. N.A. 4632 7.38 1555 13.95 814 20.64
44 2022-11-05 8272 10.23 362 23.20 N.A. N.A. 5245 6.43 1827 12.10 796 24.37
45 2022-11-12 9526 7.77 458 19.87 N.A. N.A. 5837 4.99 2415 7.99 759 19.89
46 2022-11-19 10427 6.93 575 18.43 N.A. N.A. 5952 4.96 2945 6.25 904 14.49
47 2022-11-26 10986 4.88 677 9.75 N.A. N.A. 5927 3.36 2619 4.39 1678 8.70
48 2022-12-03 10959 4.74 808 9.78 N.A. N.A. 6360 3.21 2787 4.81 931 10.20
49 2022-12-10 11309 4.09 962 7.59 N.A. N.A. 6474 2.90 2693 3.64 1064 8.93
50 2022-12-17 11052 4.58 987 8.81 N.A. N.A. 6726 3.20 2213 4.84 1038 8.67
51 2022-12-24 10580 4.49 783 5.75 N.A. N.A. 6652 3.77 2125 4.89 956 7.53
52 2022-12-31 10049 4.50 638 6.11 N.A. N.A. 6330 3.95 2047 5.23 972 5.25
1 2023-01-07 10998 4.19 802 3.12 N.A. N.A. 6872 4.13 2336 4.32 937 5.02
2 2023-01-14 10199 4.71 526 6.65 N.A. N.A. 6464 4.05 2327 4.86 832 7.81
3 2023-01-21 9133 6.68 502 7.57 N.A. N.A. 5849 5.85 1945 5.86 807 13.88
4 2023-01-28 8568 8.22 413 11.14 N.A. N.A. 5631 6.68 1747 8.70 754 16.84
5 2023-02-04 8581 8.94 596 11.07 N.A. N.A. 5367 7.60 1827 8.65 764 17.15
6 2023-02-11 8243 9.97 420 12.62 N.A. N.A. 5291 8.20 1748 10.30 740 20.00
7 2023-02-18 7927 9.87 449 11.58 N.A. N.A. 5234 8.31 1517 10.61 707 18.39
8 2023-02-25 7812 9.55 424 12.03 N.A. N.A. 5232 8.12 1463 10.25 671 17.44
9 2023-03-04 8214 9.78 421 9.26 N.A. N.A. 5408 8.69 1617 10.33 736 16.03
10 2023-03-11 7758 9.42 472 9.32 N.A. N.A. 5023 7.78 1521 12.29 714 14.85
11 2023-03-18 7676 8.77 428 8.41 N.A. N.A. 4995 7.21 1489 10.61 740 15.27
12 2023-03-25 7758 9.24 456 12.06 N.A. N.A. 5167 7.14 1525 13.05 589 15.11

Positive human coronavirus (HCoV) tests

Figure 10: Positive human coronavirus (HCoV) tests (%) in Canada by region by surveillance week
Figure 10
Figure 10: Positive human coronavirus (HCoV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests HCoV% Atl Tests HCoV% QC Tests HCoV% ON Tests HCoV% Pr Tests HCoV% BC Tests HCoV%
35 2022-09-03 2818 0.53 294 0.68 610 0.66 523 0.57 997 0.20 394 1.02
36 2022-09-10 2877 0.38 280 0.71 639 0.16 495 0.20 1046 0.67 417 0.00
37 2022-09-17 3264 0.28 301 0.00 654 0.31 658 0.46 1128 0.35 522 0.00
38 2022-09-24 3716 0.32 334 0.00 705 0.57 853 0.23 1286 0.47 538 0.00
39 2022-10-01 4034 0.59 286 0.35 716 0.84 1170 0.34 1341 0.75 521 0.58
40 2022-10-08 4079 0.93 298 1.01 568 0.35 1253 0.56 1414 1.27 546 1.47
41 2022-10-15 4922 1.00 265 0.38 842 1.07 1889 0.53 1347 2.00 579 0.35
42 2022-10-22 6026 1.16 354 0.00 884 1.02 2671 0.79 1439 2.50 678 0.59
43 2022-10-29 7155 1.86 386 0.78 922 0.65 3451 1.45 1581 4.49 814 0.37
44 2022-11-05 7767 2.54 362 0.83 943 2.55 3800 1.97 1866 5.04 796 0.13
45 2022-11-12 9087 3.00 458 0.87 1087 2.48 4325 2.80 2457 4.56 759 1.19
46 2022-11-19 10076 3.54 575 2.61 1193 3.52 4433 2.96 2971 5.02 904 2.21
47 2022-11-26 10690 3.24 677 2.66 1290 3.80 4433 3.50 2612 3.83 1678 1.43
48 2022-12-03 10723 3.94 808 2.72 1381 5.29 4788 4.24 2815 3.13 931 3.97
49 2022-12-10 10887 4.48 962 4.89 1415 5.02 4875 4.21 2571 4.24 1064 5.26
50 2022-12-17 10765 5.13 987 5.78 1350 5.63 5133 4.56 2257 4.70 1038 7.61
51 2022-12-24 10056 5.28 783 6.00 1147 6.63 5024 3.86 2149 5.07 953 11.02
52 2022-12-31 9437 4.73 638 7.21 1016 6.69 4746 3.08 2065 3.83 972 11.01
1 2023-01-07 10141 4.40 802 10.97 1017 5.11 5025 2.95 2360 3.35 937 8.43
2 2023-01-14 9360 4.01 526 9.89 829 3.50 4805 3.64 2368 2.53 832 7.09
3 2023-01-21 8614 3.46 502 6.37 849 4.71 4464 2.91 1992 2.06 807 6.82
4 2023-01-28 7905 2.63 413 4.12 813 5.17 4157 1.88 1768 1.81 754 5.17
5 2023-02-04 7997 3.20 596 4.70 788 5.96 3962 2.42 1887 2.12 764 5.89
6 2023-02-11 7619 2.64 420 5.24 816 6.62 3877 1.81 1766 1.70 740 3.38
7 2023-02-18 7381 3.14 449 4.45 860 5.93 3812 2.62 1553 1.80 707 4.67
8 2023-02-25 7223 3.06 424 4.95 795 5.28 3844 2.78 1489 1.88 671 3.43
9 2023-03-04 7540 3.41 421 5.23 788 7.99 3962 2.73 1633 2.76 736 2.58
10 2023-03-11 7115 3.70 472 5.30 766 8.09 3615 3.10 1548 2.26 714 4.06
11 2023-03-18 7115 3.70 428 4.67 764 6.41 3639 3.54 1544 2.66 740 3.24
12 2023-03-25 6999 4.51 456 2.85 642 9.50 3754 4.45 1558 2.95 589 4.92

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