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Respiratory Virus Report, Week 3 - ending January 21, 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 3 (week ending January 21, 2023) in Canada, participating RVDSS laboratories reported 8,059 detections of SARS-CoV-2 from 65,762 tests (12.3% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 8,370 to 29,576 tests), activity of nearly all viruses is stable or decreasing.

  • Activity of influenza continues to decrease and remains below the epidemic threshold. Influenza A accounts for nearly all influenza detections in Canada (410 detections; 1.4% positive).
  • Compared to pre-pandemic seasons, RSV activity is within expected levels typical of this time of year (2,043 detections; 8.2% positive).
  • Activity of all other non-SARS-CoV-2 respiratory viruses is near expected levels typical of this time of year.
  • 34/35 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 January 21, 2023 (surveillance week 2023-03)
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 665 100 346 0 0 4 4 0 346 17 346 0 0 6 2 0 346 10 346 11 346 19 346 22
Prince Edward Island 818 156 165 0 0 3 3 0 165 28 24 0 0 2 0 0 24 2 24 1 24 5 24 3
Nova Scotia 3428 841 1582 0 0 30 30 0 1573 133 37 0 0 0 1 0 41 1 41 0 41 2 41 4
New Brunswick 3524 361 1765 2 4 2 8 1 1583 140 91 0 1 8 0 0 91 8 91 3 91 12 91 3
Atlantic 8435 1458 3858 2 4 39 45 1 3667 318 498 0 1 16 3 0 502 21 502 15 502 38 502 32
Région Nord-Est 2406 200 1699 0 0 64 64 0 555 53 57 0 0 1 0 0 57 3 56 5 N.C. N.C. 57 1
Québec-Chaudière-Appalaches 4963 419 822 0 0 31 31 2 787 55 177 0 0 1 0 0 191 10 177 11 N.C. N.C. 177 8
Centre-du-Québec 3517 498 486 0 0 12 12 1 321 15 23 0 0 1 0 0 23 2 23 1 N.C. N.C. 23 1
Montréal-Laval 4759 518 3508 0 0 65 65 14 1419 63 555 0 0 19 0 0 555 27 561 9 N.C. N.C. 555 27
Ouest du Québec 2900 340 816 0 0 14 14 2 778 79 27 0 0 2 0 0 27 2 27 1 N.C. N.C. 27 2
Montérégie 3251 363 701 0 0 14 14 1 689 31 1 0 0 0 0 0 1 0 1 0 N.C. N.C. 1 0
Province of Québec 21796 2338 8032 0 0 200 200 20 4549 296 840 0 0 24 0 0 854 44 845 27 N.C. N.C. 840 39
P.H.O.L. - Ottawa 753 209 260 6 0 3 9 0 260 13 156 0 0 0 0 2 156 1 156 4 156 8 156 12
EORLA 2069 212 447 0 0 4 4 0 447 24 32 0 0 1 0 0 32 2 32 0 32 4 32 1
P.H.O.L. - Kingston 654 161 96 0 0 0 0 0 96 21 60 0 0 0 0 1 60 1 60 2 60 3 60 0
UHN / Mount Sinai Hospital 2624 203 746 0 0 8 8 0 746 15 119 0 0 0 0 0 119 1 119 0 119 3 119 6
P.H.O.L. - Toronto 1010 257 948 5 11 1 9 0 948 57 811 0 0 0 0 28 811 13 811 20 811 63 811 51
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 2351 198 2351 5 9 1 15 1 2351 62 2333 0 0 0 0 28 2333 28 2364 24 2364 124 2363 21
P.H.O.L. - Sault Ste. Marie 47 0 48 0 0 0 0 0 48 7 45 0 0 0 0 5 45 1 45 4 45 4 45 4
P.H.O.L. - Timmins 234 15 41 0 0 0 0 0 41 14 41 0 0 0 0 0 41 1 41 0 41 0 41 2
St. Joseph's - London 3146 341 855 0 0 6 6 1 855 51 75 0 0 0 0 2 75 2 75 0 75 7 75 1
P.H.O.L. - London 1084 303 545 0 0 0 0 0 545 54 351 0 0 0 0 14 351 3 351 13 351 21 351 20
P.H.O.L. - Orillia 11 3 46 0 0 0 0 0 46 4 46 0 0 0 0 1 46 2 46 3 46 3 46 1
P.H.O.L. - Thunder Bay 183 37 43 0 0 1 1 0 43 7 31 0 0 0 0 3 31 0 31 2 31 2 31 0
P.H.O.L. - Sudbury 59 3 39 0 0 0 0 0 39 13 30 0 0 0 0 1 30 0 30 4 30 0 30 0
P.H.O.L. - Hamilton 731 226 376 0 1 1 2 0 376 26 229 0 0 0 0 10 229 2 229 2 229 20 229 4
P.H.O.L. - Peterborough 104 18 47 0 0 0 0 0 47 8 31 0 0 0 0 0 31 0 31 0 31 1 31 0
St. Joseph's - Hamilton 2716 368 1384 0 0 11 11 2 1384 48 1384 0 0 31 0 0 1384 19 1384 12 1384 78 0 0
Sault Area Hospital 325 39 191 0 1 2 3 0 191 10 42 0 0 1 0 0 42 0 42 0 42 1 42 7
Province of Ontario 18101 2593 8463 16 22 38 68 4 8463 434 5816 0 0 33 0 95 5816 76 5847 90 5847 342 4462 130
Manitoba 1686 178 1271 0 1 9 10 0 1271 105 144 0 0 4 0 0 144 2 169 5 144 4 169 10
Saskatchewan 5094 246 1243 0 0 11 11 0 1031 137 412 1 2 19 0 0 411 9 411 27 411 33 412 10
Alberta 5730 690 3769 20 9 25 54 14 3307 433 1314 9 1 37 2 0 1314 11 1313 56 1292 73 1314 17
Prairies 12510 1114 6283 20 10 45 75 14 5609 675 1870 10 3 60 2 0 1869 22 1893 88 1847 110 1895 37
British Columbia 4636 532 2805 4 5 0 22 0 2611 307 700 0 1 27 2 0 700 26 700 25 671 95 671 44
Yukon 114 7 25 2 0 0 0 0 25 1 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 35 3 30 0 0 0 0 0 30 10 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 30 4 N.C. N.C.
Nunavut 135 14 80 0 0 0 0 0 80 2 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 284 24 135 2 0 0 0 0 135 13 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 30 4 N.C. N.C.
CANADA 65762 8059 29576 44 41 322 410 39 25034 2043 9724 10 5 160 7 95 9741 189 9787 245 8897 589 8370 282

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 January 21, 2023 (surveillance weeks 2022-35 to 2023-03)
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 12475 2581 7003 1 246 665 912 0 7003 249 7003 4 29 54 18 0 7003 145 7003 255 7003 559 7003 255
Prince Edward Island 24541 6077 2214 1 117 237 355 0 2214 175 970 15 25 74 6 0 970 58 970 12 970 306 970 27
Nova Scotia 95323 19120 24588 0 4 3601 3605 1 24578 1849 843 4 16 21 3 0 846 35 836 2 846 163 846 23
New Brunswick 83067 11759 30225 4 132 4392 4528 5 23676 1452 2114 3 20 120 7 0 2114 155 2114 41 2114 401 2059 138
Atlantic 215406 39537 64030 6 499 8895 9400 6 57471 3725 10930 26 90 269 34 0 10933 393 10923 310 10933 1429 10878 443
Région Nord-Est 60436 8225 29695 0 2 3537 3539 7 10249 1015 787 7 3 46 0 0 787 40 779 50 N.C. N.C. 787 37
Québec-Chaudière-Appalaches 132054 13138 16153 0 0 2763 2763 12 15847 1636 4454 20 5 40 0 0 4715 295 4454 223 N.C. N.C. 4454 187
Centre-du-Québec 104153 14999 11008 0 0 1733 1733 14 9484 824 572 13 0 24 2 0 572 46 572 57 N.C. N.C. 572 26
Montréal-Laval 144707 19215 56009 0 9 5864 5873 81 30968 2211 13761 121 13 243 10 0 13770 550 13868 610 N.C. N.C. 13446 390
Ouest du Québec 80108 11115 13493 0 7 2136 2143 9 11561 1033 707 20 0 53 1 0 706 129 707 40 N.C. N.C. 708 28
Montérégie 102833 12256 14289 0 0 1612 1612 12 13700 938 81 0 0 2 0 0 81 1 81 4 N.C. N.C. 81 1
Province of Québec 624291 78948 140647 0 18 17645 17663 135 91809 7657 20362 181 21 408 13 0 20631 1061 20461 984 N.C. N.C. 20048 669
P.H.O.L. - Ottawa 21562 5525 3029 11 131 65 202 0 3029 226 2198 0 0 0 0 52 2198 7 2198 31 2198 140 2198 66
EORLA 61408 6635 10246 0 0 1369 1369 3 10246 1152 818 8 3 32 16 0 818 42 818 25 818 188 818 54
P.H.O.L. - Kingston 21687 3675 1726 2 88 38 128 1 1725 143 1452 0 0 0 0 66 1453 21 1453 24 1452 161 1453 52
UHN / Mount Sinai Hospital 66020 5351 13187 4 43 336 383 14 13187 218 851 0 0 4 0 0 818 2 851 0 851 26 851 42
P.H.O.L. - Toronto 41570 8841 16571 71 2378 141 1083 1 16542 974 14369 0 0 0 0 599 14372 207 14369 179 14369 1079 14369 589
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 55381 4208 55384 61 1442 714 2217 20 55383 1927 32628 4 0 16 0 391 32641 287 32798 189 32746 883 32639 561
P.H.O.L. - Sault Ste. Marie 1328 245 407 1 52 14 57 0 407 10 352 0 0 0 0 35 352 1 352 24 352 14 352 9
P.H.O.L. - Timmins 6809 744 713 0 161 6 156 0 712 63 691 0 0 0 0 40 691 12 691 10 691 47 691 26
St. Joseph's - London 88797 11652 10358 0 0 867 867 12 10358 869 1202 0 0 0 0 46 1236 40 1236 6 1236 179 824 60
P.H.O.L. - London 26399 5780 6561 8 579 60 630 3 6560 675 5500 0 0 0 0 291 5501 69 5501 45 5500 383 5501 218
P.H.O.L. - Orillia 424 219 1657 6 260 23 289 0 1657 209 1598 0 0 0 0 107 1598 32 1598 35 1598 191 1598 83
P.H.O.L. - Thunder Bay 6661 1427 688 0 106 4 110 0 687 64 599 0 0 0 0 28 599 15 599 8 599 44 599 14
P.H.O.L. - Sudbury 1637 246 525 1 65 14 67 0 525 53 427 0 0 0 0 20 427 5 427 15 427 23 427 20
P.H.O.L. - Hamilton 19620 5159 5524 5 298 91 394 4 5521 441 3989 0 0 0 0 169 3991 44 3989 40 3989 323 3989 159
P.H.O.L. - Peterborough 3253 593 813 0 64 9 73 0 813 87 698 0 0 0 0 25 698 7 698 18 698 97 698 26
St. Joseph's - Hamilton 63696 9926 26376 0 0 2664 2664 10 26376 2074 26376 0 0 747 0 0 26376 233 26376 151 26376 1781 0 0
Sault Area Hospital 9699 1614 6278 1 260 255 516 0 6278 65 1807 33 0 43 2 0 1807 35 1807 85 1807 187 1807 39
Province of Ontario 495951 71840 160043 171 5927 6670 11205 68 160006 9250 95555 45 3 842 18 1869 95576 1059 95761 885 95707 5746 68814 2018
Manitoba 47157 8771 22712 16 196 1738 1950 0 22712 1242 3559 2 4 129 6 0 3549 107 3662 146 3559 556 3662 137
Saskatchewan 123124 10271 26873 0 0 3864 3864 8 20393 1303 8868 29 39 412 8 0 8870 202 8872 480 8870 769 8868 333
Alberta 162140 26788 78352 837 7256 2661 10754 33 67075 6006 27435 148 61 568 32 0 27425 314 27393 587 26983 2404 27435 833
Prairies 332421 45830 127937 853 7452 8263 16568 41 110180 8551 39862 179 104 1109 46 0 39844 623 39927 1213 39412 3729 39965 1303
British Columbia 172195 16980 79439 321 4309 294 8634 42 73751 5489 17054 138 159 616 118 6 17042 372 17042 358 16552 2509 16549 644
Yukon 3906 270 512 2 134 0 140 0 509 13 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 1223 149 1118 2 147 1 150 0 1118 57 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 1118 231 N.C. N.C.
Nunavut 3069 297 1581 3 230 3 236 0 1581 39 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 8198 716 3211 7 511 4 526 0 3208 109 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 1118 231 N.C. N.C.
CANADA 1848462 253851 575307 1358 18716 41771 63996 292 496425 34781 183763 569 377 3244 229 1875 184026 3508 184114 3750 163722 13644 156254 5077

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 13.40 2.25 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 12.25 1.39 0.04 0.01 28.20 9.13 18.94 0.13 0.01 0.01 12.75 0.35 4.69 8.16 3.42 0.03 15.56 6.72 10.32
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 6.94 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 6.62 3.12 3.56 8.42 4.44 6.01 2.85 0.76 0.05 3.25 2.59 2.82 1.94 1.34 0.40 2.10 1.15 1.45 2.50 0.24 0.11 5.56 0.47 3.13 3.37 4.97 0.26 7.90 4.17 6.11

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 71515 13.40 9630 17.07 22568 12.08 19452 15.40 13831 10.48 5694 12.93 340 8.53
3 2023-01-21 65762 12.25 8435 17.29 21796 10.73 18101 14.33 12510 8.90 4636 11.48 284 8.45

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 35457 2.25 0.05 4291 2.47 0.02 8882 3.47 0.08 9533 1.31 0.08 7943 1.84 0.01 4646 2.17 0.02 162 6.79 0.00
3 2023-01-21 29576 1.39 0.13 3858 1.17 0.03 8032 2.49 0.25 8463 0.80 0.05 6283 1.19 0.22 2805 0.78 0.00 135 0.00 0.00

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 30526 9.12 4078 7.41 5279 4.81 9533 7.09 7099 13.90 4375 12.75 162 4.32
3 2023-01-21 25034 8.16 3667 8.67 4549 6.51 8463 5.13 5609 12.03 2611 11.76 135 9.63

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 11672 3.97 575 5.91 1243 3.06 5943 3.30 2973 3.87 937 8.54
47 2022-11-26 12300 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 11008 3.24 526 3.80 828 2.17 6448 2.82 2342 3.20 864 7.18
3 2023-01-21 9724 2.85 498 4.02 840 2.86 5816 2.20 1870 4.01 700 4.29

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 11696 1.87 575 4.35 1265 4.66 5946 1.19 2972 1.38 937 2.45
47 2022-11-26 12291 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 11016 1.87 526 3.42 838 6.21 6448 1.12 2340 1.67 864 2.89
3 2023-01-21 9741 1.94 502 4.18 854 5.15 5816 1.31 1869 1.18 700 3.71

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 11677 1.89 575 3.65 1247 6.58 5955 0.27 2962 2.87 937 1.81
47 2022-11-26 12282 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 11048 2.61 526 3.04 831 2.77 6466 1.79 2361 4.62 864 2.78
3 2023-01-21 9787 2.50 502 2.99 845 3.20 5847 1.54 1893 4.65 700 3.57

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 10428 6.94 575 18.43 N.A N.A 5952 4.96 2945 6.25 904 14.49
47 2022-11-26 10987 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 10192 4.71 526 6.65 N.A N.A 6466 4.05 2318 4.87 832 7.81
3 2023-01-21 8897 6.62 502 7.57 N.A N.A 5847 5.85 1847 5.96 671 14.16

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 10077 3.54 575 2.61 1193 3.52 4433 2.96 2971 5.02 904 2.21
47 2022-11-26 10691 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 9362 4.01 526 9.89 829 3.50 4807 3.64 2368 2.53 832 7.09
3 2023-01-21 8370 3.37 502 6.37 840 4.64 4462 2.91 1895 1.95 671 6.56

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