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Respiratory Virus Report, Week 1 - ending January 7, 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 1 (week ending January 7, 2023) in Canada, participating RVDSS laboratories reported 11,318 detections of SARS-CoV-2 from 75,090 tests (15.1% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 9,894 to 37,731 tests), activity of respiratory syncytial virus (RSV) is now higher than influenza.

  • Activity of influenza is decreasing sharply. Influenza A accounts for nearly all influenza detections in Canada, and activity of influenza A is now far below average levels typical of this time of year (1,721 detections; 4.6% positive)
  • Activity of RSV is following seasonal trends at the national level. Compared to pre-pandemic seasons, RSV activity is near average levels typical of this time of year (3,179 detections; 10.1% positive).
  • Activity of most other non-SARS-CoV-2 respiratory viruses is near 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 January 7, 2023 (surveillance week 2023-01)
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 725 142 620 0 0 56 56 0 620 28 620 1 3 9 0 0 620 12 620 22 620 13 620 63
Prince Edward Island 836 154 218 0 1 7 8 0 218 30 21 0 0 1 1 0 21 3 21 0 21 3 21 3
Nova Scotia 4076 945 2101 0 0 82 82 0 2101 192 32 0 0 3 0 0 32 0 32 1 32 1 32 5
New Brunswick 4297 557 2521 1 8 114 123 0 2205 212 129 0 0 7 0 0 129 15 129 5 129 8 129 17
Atlantic 9934 1798 5460 1 9 259 269 0 5144 462 802 1 3 20 1 0 802 30 802 28 802 25 802 88
Région Nord-Est 3024 343 2249 0 1 262 263 0 870 102 44 0 0 3 0 0 44 3 44 2 N.C. N.C. 44 3
Québec-Chaudière-Appalaches 5619 724 1432 0 0 177 177 0 1355 85 232 0 0 2 0 0 241 12 232 12 N.C. N.C. 232 7
Centre-du-Québec 4248 643 632 0 0 40 40 1 468 29 30 0 0 4 1 0 30 4 30 0 N.C. N.C. 30 2
Montréal-Laval 4724 667 4364 0 0 147 147 13 1776 80 688 3 0 14 1 0 688 43 690 18 N.C. N.C. 688 40
Ouest du Québec 3434 525 1107 0 0 57 57 1 1046 72 10 0 0 1 0 0 10 3 10 1 N.C. N.C. 10 0
Montérégie 3666 479 835 0 0 50 50 0 782 38 3 0 0 0 0 0 3 0 3 0 N.C. N.C. 3 0
Province of Québec 24715 3381 10619 0 1 733 734 15 6297 406 1007 3 0 24 2 0 1016 65 1009 33 N.C. N.C. 1007 52
P.H.O.L. - Ottawa 1011 343 312 1 9 6 16 0 312 27 160 0 0 0 0 5 160 1 160 4 160 4 160 9
EORLA 2444 247 737 0 0 49 49 1 737 79 37 0 0 6 0 0 37 3 37 3 37 4 37 2
P.H.O.L. - Kingston 799 193 119 0 2 1 3 0 119 18 85 0 0 0 0 4 85 0 85 3 85 1 85 1
UHN / Mount Sinai Hospital 2773 267 841 0 0 15 15 1 841 29 84 0 0 0 0 0 84 0 84 0 84 1 84 2
P.H.O.L. - Toronto 1318 434 1165 9 55 6 33 0 1163 104 970 0 0 0 0 31 970 19 970 16 970 67 970 43
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 2599 347 2599 9 35 3 47 4 2599 116 2595 0 0 0 0 37 2595 30 2603 31 2604 83 2604 29
P.H.O.L. - Sault Ste. Marie 11 2 23 0 3 0 3 0 23 2 23 0 0 0 0 7 23 0 23 3 23 1 23 0
P.H.O.L. - Timmins 186 16 30 0 2 0 2 0 30 11 30 0 0 0 0 0 30 0 30 0 30 0 30 1
St. Joseph's - London 3351 541 757 0 0 18 18 1 757 73 71 0 0 0 0 0 71 5 71 2 71 3 71 14
P.H.O.L. - London 1137 227 552 1 11 5 16 0 552 81 417 0 0 0 0 23 417 1 417 2 417 19 417 18
P.H.O.L. - Orillia 27 8 89 0 3 1 4 0 89 19 83 0 0 0 0 7 83 1 83 5 83 6 83 5
P.H.O.L. - Thunder Bay 233 83 44 0 0 0 0 0 44 8 39 0 0 0 0 5 39 1 39 1 39 1 39 1
P.H.O.L. - Sudbury 85 10 51 0 10 8 10 0 51 7 30 0 0 0 0 1 30 0 30 3 30 1 30 0
P.H.O.L. - Hamilton 903 365 491 0 8 6 14 1 491 32 293 0 0 0 0 8 295 1 293 10 293 22 293 20
P.H.O.L. - Peterborough 123 18 55 0 1 1 2 0 55 15 37 0 0 0 0 0 37 0 37 4 37 1 37 2
St. Joseph's - Hamilton 3375 588 1847 0 0 56 56 0 1847 184 1847 0 0 62 0 0 1847 15 1847 25 1847 69 0 0
Sault Area Hospital 410 44 410 0 3 16 19 0 410 4 59 0 0 5 0 0 59 0 59 3 59 1 59 1
Province of Ontario 20785 3733 10122 20 142 191 307 8 10120 809 6860 0 0 73 0 128 6862 77 6868 115 6869 284 5022 148
Manitoba 1997 188 1545 0 3 40 43 0 1545 164 124 1 0 12 0 0 124 6 152 9 124 12 152 22
Saskatchewan 4908 324 1424 0 0 31 31 0 1178 183 560 4 1 35 0 0 561 9 561 42 561 28 560 23
Alberta 6498 1009 4562 50 47 65 162 0 4124 751 1469 3 0 32 1 0 1468 16 1469 76 1455 52 1469 29
Prairies 13403 1521 7531 50 50 136 236 0 6847 1098 2153 8 1 79 1 0 2153 31 2182 127 2140 92 2181 74
British Columbia 5970 846 3885 9 59 0 166 5 2880 401 909 3 6 55 14 0 909 18 909 34 882 48 882 77
Yukon 139 17 53 0 2 0 6 0 53 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 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.R. N.R. N.C. N.C.
Nunavut 144 22 61 0 3 0 3 0 61 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 283 39 114 0 5 0 9 0 114 3 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 0 0 N.C. N.C.
CANADA 75090 11318 37731 80 266 1319 1721 28 31402 3179 11731 15 10 251 18 128 11742 221 11770 337 10693 449 9894 439

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 7, 2023 (surveillance weeks 2022-35 to 2023-01)
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 11086 2381 6283 1 233 655 889 0 6283 224 6283 4 28 38 16 0 6283 129 6283 239 6283 526 6283 194
Prince Edward Island 22820 5759 1849 1 117 224 342 0 1849 117 926 15 25 69 6 0 926 55 926 11 926 297 926 22
Nova Scotia 88099 17341 21432 0 4 3533 3537 1 21431 1578 773 4 16 20 2 0 772 33 762 2 772 159 772 18
New Brunswick 75336 10954 26317 2 120 4359 4481 3 20163 1186 1924 3 19 107 7 0 1924 137 1924 27 1924 374 1869 125
Atlantic 197341 36435 55881 4 474 8771 9249 4 49726 3105 9906 26 88 234 31 0 9905 354 9895 279 9905 1356 9850 359
Région Nord-Est 55401 7711 26275 0 2 3360 3362 7 9131 917 698 7 3 44 0 0 698 34 691 45 N.C. N.C. 698 34
Québec-Chaudière-Appalaches 121742 12163 14310 0 0 2682 2682 10 14092 1528 4110 20 4 38 0 0 4345 270 4110 200 N.C. N.C. 4110 176
Centre-du-Québec 96703 13981 10006 0 0 1704 1704 13 8754 790 523 12 0 21 1 0 523 39 523 54 N.C. N.C. 523 23
Montréal-Laval 135829 18131 48693 0 8 5701 5709 61 27972 2102 12618 121 13 212 10 0 12627 496 12717 593 N.C. N.C. 12303 341
Ouest du Québec 74009 10395 11654 0 7 2104 2111 6 9792 891 660 20 0 48 1 0 659 123 660 38 N.C. N.C. 660 26
Montérégie 96211 11500 12751 0 0 1585 1585 11 12200 876 75 0 0 2 0 0 75 1 75 4 N.C. N.C. 75 1
Province of Québec 579895 73881 123689 0 17 17136 17153 108 81941 7104 18684 180 20 365 12 0 18927 963 18776 934 N.C. N.C. 18369 601
P.H.O.L. - Ottawa 19997 5108 2520 4 131 61 191 0 2520 181 1902 0 0 0 0 46 1902 6 1902 19 1902 127 1902 44
EORLA 57462 6277 9291 0 0 1351 1351 3 9291 1087 756 7 3 30 16 0 756 37 756 24 756 179 756 52
P.H.O.L. - Kingston 20300 3335 1497 2 88 38 128 1 1496 102 1310 0 0 0 0 63 1311 19 1311 22 1310 156 1311 47
UHN / Mount Sinai Hospital 60659 4882 11741 3 43 322 368 14 11741 189 664 0 0 4 0 0 631 1 664 0 664 19 664 34
P.H.O.L. - Toronto 39388 8301 14418 61 2343 137 1056 1 14389 788 12545 0 0 0 0 534 12548 182 12545 133 12545 950 12545 465
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 50595 3777 50598 50 1411 711 2172 16 50597 1772 27865 4 0 16 0 327 27878 235 27986 138 27934 711 27828 505
P.H.O.L. - Sault Ste. Marie 1261 242 339 1 48 12 53 0 339 3 291 0 0 0 0 27 291 0 291 19 291 10 291 2
P.H.O.L. - Timmins 6375 714 617 0 160 6 155 0 616 35 598 0 0 0 0 40 598 9 598 9 598 45 598 18
St. Joseph's - London 82189 10862 8595 0 0 856 856 8 8595 747 1042 0 0 0 0 39 1076 36 1076 6 1076 165 664 56
P.H.O.L. - London 24346 5225 5493 8 578 60 629 1 5492 553 4781 0 0 0 0 260 4782 59 4782 29 4781 354 4782 182
P.H.O.L. - Orillia 407 216 1547 4 258 23 285 0 1547 196 1490 0 0 0 0 104 1490 28 1490 23 1490 183 1490 80
P.H.O.L. - Thunder Bay 6193 1315 571 0 106 3 109 0 570 45 504 0 0 0 0 19 504 14 504 3 504 42 504 13
P.H.O.L. - Sudbury 1499 227 419 1 64 12 65 0 419 29 348 0 0 0 0 18 348 5 348 7 348 21 348 17
P.H.O.L. - Hamilton 18007 4623 4644 5 293 88 386 4 4641 378 3503 0 0 0 0 148 3505 38 3503 33 3503 271 3503 149
P.H.O.L. - Peterborough 2952 530 715 0 63 9 72 0 715 69 636 0 0 0 0 25 636 7 636 16 636 94 636 23
St. Joseph's - Hamilton 57772 9084 23333 0 0 2628 2628 8 23333 1918 23333 0 0 669 0 0 23333 200 23333 114 23333 1633 0 0
Sault Area Hospital 8997 1533 5710 1 255 252 508 0 5710 48 1721 30 0 37 1 0 1721 35 1721 84 1721 182 1721 26
Province of Ontario 458399 66251 142048 140 5841 6569 11012 56 142011 8140 83289 41 3 756 17 1650 83310 911 83446 679 83392 5142 59543 1713
Manitoba 43637 8385 19917 15 192 1704 1911 0 19917 998 3265 2 4 123 6 0 3255 102 3336 132 3265 543 3336 107
Saskatchewan 112678 9754 24009 0 0 3826 3826 8 18091 978 7911 25 37 374 8 0 7914 173 7916 422 7914 707 7911 305
Alberta 149737 25099 68942 785 7208 2580 10573 18 58712 4787 24237 131 58 488 23 0 24229 283 24203 447 23833 2244 24237 789
Prairies 306052 43238 112868 800 7400 8110 16310 26 96720 6763 35413 158 99 985 37 0 35398 558 35455 1001 35012 3494 35484 1201
British Columbia 161861 15712 70721 306 4255 278 8443 40 65498 4435 15435 137 157 542 101 6 15423 321 15423 305 14994 2350 14991 539
Yukon 3664 256 442 0 129 0 135 0 439 11 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 939 126 861 2 114 0 116 0 861 33 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 861 210 N.C. N.C.
Nunavut 2779 263 1435 3 230 3 236 0 1435 34 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 7382 645 2738 5 473 3 487 0 2735 78 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 861 210 N.C. N.C.
CANADA 1710930 236162 507945 1255 18460 40867 62654 234 438631 29625 162727 542 367 2882 198 1656 162963 3107 162995 3198 144164 12552 138237 4413

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 0.17 0.04 0.00 1.60 0.11 0.68 0.02 0.00 0.02 0.28 0.00 0.13 1.15 4.43 0.02 1.34 0.38 0.60
36 2022-09-10 13.06 0.14 0.01 0.00 2.11 0.23 0.98 0.04 0.00 0.00 0.55 0.00 0.15 1.13 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 13.59 0.49 0.00 0.02 2.15 0.43 1.16 0.02 0.00 0.00 0.21 0.00 0.14 1.41 7.16 0.10 1.24 0.37 0.64
39 2022-10-01 14.43 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 15.04 0.99 0.00 0.00 2.17 1.01 1.58 0.03 0.02 0.00 0.20 0.05 0.11 2.45 8.53 0.07 1.39 0.34 0.67
41 2022-10-15 16.56 1.44 0.03 0.01 2.66 1.05 1.57 0.01 0.03 0.00 0.36 0.03 0.16 3.54 9.54 0.10 1.74 0.58 0.98
42 2022-10-22 15.36 2.40 0.03 0.00 2.96 0.77 1.92 0.05 0.02 0.00 0.45 0.05 0.25 4.58 8.18 0.07 2.11 0.63 1.14
43 2022-10-29 15.75 5.57 0.03 0.01 5.23 0.68 2.60 0.03 0.02 0.00 0.55 0.06 0.23 6.63 8.11 0.07 2.16 0.55 1.32
44 2022-11-05 13.88 10.90 0.10 0.04 8.42 1.08 3.39 0.03 0.10 0.03 0.71 0.12 0.31 7.71 7.82 0.05 3.35 0.83 1.92
45 2022-11-12 12.38 15.98 0.07 0.02 9.83 1.18 4.19 0.04 0.06 0.02 0.97 0.22 0.44 7.65 7.03 0.04 4.43 1.29 2.59
46 2022-11-19 11.92 19.81 0.10 0.03 13.95 1.42 5.47 0.05 0.06 0.01 1.49 0.09 0.58 7.61 7.18 0.06 6.33 1.38 3.29
47 2022-11-26 11.74 23.74 0.13 0.03 15.24 1.25 6.91 0.04 0.07 0.04 2.13 0.13 0.80 6.71 8.10 0.03 8.69 1.79 4.46
48 2022-12-03 12.11 23.64 0.19 0.04 18.07 0.76 9.40 0.03 0.15 0.01 3.18 0.08 1.20 6.99 8.92 0.02 9.47 3.11 5.72
49 2022-12-10 12.59 21.48 0.23 0.03 19.52 1.43 11.41 0.06 0.05 0.01 4.21 0.19 1.60 7.28 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 14.16 12.48 0.18 0.00 28.53 2.27 16.81 0.05 0.02 0.01 10.44 0.19 3.30 9.27 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 10.65 6.72 0.01 17.80 6.83 10.39
1 2023-01-07 15.07 4.56 0.08 0.00 30.93 4.58 19.55 0.07 0.00 0.00 10.34 0.22 3.86 10.12 5.26 0.04 15.62 7.12 10.17
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 22.87 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 1.57 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 3.64 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 4.75 16.64 7.94 16.72 12.69 13.83 3.05 5.78 0.02 6.14 3.03 4.18 1.88 1.89 0.35 3.34 1.66 2.48 1.86 1.48 0.02 1.94 0.31 1.08 3.95 4.94 0.02 4.30 1.00 2.04
49 2022-12-10 4.14 14.57 6.21 16.32 10.72 13.07 3.07 3.97 0.00 5.65 2.94 4.19 1.70 2.48 0.54 3.03 1.84 2.49 1.91 1.22 0.05 2.80 0.49 1.46 4.46 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 4.46 7.71 6.53 14.41 6.24 9.23 3.31 2.13 0.03 5.08 2.87 3.75 1.80 1.92 0.48 2.59 1.20 1.76 2.73 1.00 0.11 3.81 0.41 2.44 4.75 10.33 0.07 6.73 2.78 4.75
1 2023-01-07 4.20 5.71 5.43 11.09 4.36 7.42 3.60 1.84 0.12 5.08 2.68 3.34 1.88 1.84 0.81 2.67 0.85 1.54 2.86 0.72 0.06 4.45 0.28 2.70 4.44 9.27 0.12 7.77 3.07 5.16

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 95303 13.40 10317 23.39 26519 12.26 28978 12.71 14405 16.06 14523 7.27 561 9.27
36 2022-09-10 87999 13.06 9220 22.81 25637 12.40 25742 12.04 13362 15.37 13642 7.44 396 10.86
37 2022-09-17 94358 12.73 9788 18.93 26091 12.17 28069 12.72 14236 16.17 15727 6.70 447 13.20
38 2022-09-24 96263 13.59 9345 24.14 26931 13.36 28977 12.35 15018 16.73 15532 6.99 460 10.43
39 2022-10-01 92662 14.43 8311 23.17 29662 13.22 27909 13.57 14871 17.48 11511 9.65 398 7.79
40 2022-10-08 95437 15.04 11290 20.91 31745 13.44 30640 14.46 14741 16.41 6525 13.01 496 6.05
41 2022-10-15 93065 16.56 9618 27.02 32473 13.37 28633 17.02 15414 17.56 6458 13.35 469 5.76
42 2022-10-22 95235 15.36 11962 20.72 32792 12.10 26742 17.29 16859 16.63 6521 11.13 359 7.24
43 2022-10-29 94724 15.75 9563 21.97 33446 11.75 25142 19.65 20163 16.20 5991 10.82 419 8.11
44 2022-11-05 89743 13.88 8906 17.97 32692 11.30 23508 16.57 17671 15.09 6497 8.56 469 8.74
45 2022-11-12 89589 12.38 10513 14.36 31704 10.58 22024 13.83 18318 13.66 6651 9.76 379 6.86
46 2022-11-19 90434 11.92 10650 13.65 30751 11.13 21425 12.63 20613 12.23 6640 9.79 355 7.61
47 2022-11-26 93854 11.74 11661 13.65 33538 11.43 20744 11.77 20318 11.63 7236 10.50 357 8.68
48 2022-12-03 94394 12.11 12354 13.22 35546 12.94 20852 11.38 18471 11.52 6818 9.78 353 7.65
49 2022-12-10 93704 12.59 13445 13.82 34896 13.36 21214 12.29 16549 10.67 7196 12.26 404 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 78839 14.16 10225 15.87 30937 14.58 18610 15.78 13249 10.30 5579 12.56 239 10.04
52 2022-12-31 69855 15.61 8458 19.43 25555 15.28 18080 17.14 11688 11.91 5877 14.45 197 7.11
1 2023-01-07 75090 15.07 9934 18.10 24715 13.68 20785 17.96 13403 11.35 5970 14.17 283 13.78

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 12693 0.17 0.02 932 0.11 0.11 2404 0.17 0.04 4663 0.11 0.00 2573 0.31 0.04 2006 0.20 0.00 115 0.00 0.00
36 2022-09-10 12544 0.14 0.04 906 0.00 0.00 2520 0.12 0.00 4411 0.16 0.02 2566 0.16 0.08 2055 0.19 0.10 86 0.00 0.00
37 2022-09-17 13440 0.24 0.01 854 0.12 0.00 2618 0.19 0.04 4801 0.31 0.02 2798 0.18 0.00 2247 0.22 0.00 122 0.82 0.00
38 2022-09-24 14421 0.49 0.02 788 0.13 0.00 2714 0.22 0.04 5515 0.38 0.00 3044 0.43 0.03 2226 1.21 0.04 134 1.49 0.00
39 2022-10-01 14841 0.68 0.03 688 0.29 0.15 2873 0.21 0.10 5624 0.66 0.02 3132 0.64 0.00 2411 1.33 0.00 113 3.54 0.00
40 2022-10-08 14485 0.99 0.03 818 0.24 0.00 2339 0.21 0.00 5676 1.02 0.05 3081 0.88 0.03 2430 1.85 0.00 141 4.26 0.00
41 2022-10-15 16215 1.44 0.01 776 1.68 0.00 3275 0.49 0.00 5761 1.89 0.00 3737 0.96 0.03 2540 1.85 0.00 126 10.32 0.00
42 2022-10-22 17731 2.40 0.05 1001 2.60 0.00 3608 0.86 0.03 6230 3.10 0.08 4006 2.15 0.02 2774 2.45 0.07 112 18.75 0.00
43 2022-10-29 18445 5.57 0.03 969 3.72 0.00 3821 1.41 0.08 6013 8.13 0.02 4456 7.05 0.00 3026 3.34 0.07 160 20.63 0.00
44 2022-11-05 21494 10.90 0.03 1209 8.02 0.00 4458 3.45 0.02 7006 11.28 0.04 5540 17.94 0.02 3111 8.07 0.06 170 33.53 0.00
45 2022-11-12 26572 15.98 0.04 2145 11.38 0.05 5731 7.47 0.07 8254 13.28 0.04 6772 27.82 0.03 3507 16.03 0.03 163 19.63 0.00
46 2022-11-19 32808 19.81 0.05 3433 14.54 0.00 6914 13.65 0.04 8727 14.32 0.07 8818 30.32 0.06 4741 23.52 0.04 175 10.29 0.00
47 2022-11-26 39766 23.74 0.04 5140 24.20 0.00 9252 22.84 0.06 9193 16.41 0.03 9734 29.45 0.01 6279 26.74 0.10 168 17.86 0.00
48 2022-12-03 43395 23.64 0.03 6393 27.94 0.02 12431 26.91 0.06 9930 16.05 0.02 9117 23.97 0.03 5334 24.07 0.00 190 33.16 0.00
49 2022-12-10 43589 21.48 0.06 7404 28.55 0.00 12591 25.07 0.14 10580 13.16 0.06 7441 20.51 0.03 5326 20.32 0.04 247 38.06 0.00
50 2022-12-17 44347 17.20 0.07 6554 23.25 0.00 13081 21.57 0.15 10525 10.56 0.02 8255 14.40 0.01 5731 16.18 0.10 201 27.36 0.00
51 2022-12-24 40138 12.48 0.05 5487 16.93 0.00 11742 17.27 0.09 9666 6.57 0.03 8000 9.65 0.01 5122 12.16 0.10 121 18.18 0.00
52 2022-12-31 38233 7.97 0.07 4924 9.36 0.00 10673 12.05 0.14 9371 4.30 0.09 7708 6.38 0.04 5477 7.23 0.04 80 11.25 0.00
1 2023-01-07 37731 4.56 0.07 5460 4.93 0.00 10619 6.91 0.14 10122 3.03 0.08 7531 3.13 0.00 3885 4.27 0.13 114 7.89 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 11509 1.15 832 1.44 1737 3.51 4663 0.54 2367 0.68 1795 0.50 115 7.83
36 2022-09-10 11349 1.13 785 0.64 1737 2.71 4411 1.00 2415 0.54 1915 0.73 86 5.81
37 2022-09-17 12232 1.05 721 0.97 1851 3.51 4801 0.60 2610 0.61 2127 0.38 122 2.46
38 2022-09-24 13235 1.41 707 1.13 1908 5.56 5515 0.98 2821 0.35 2150 0.33 134 1.49
39 2022-10-01 13527 2.11 556 3.06 2029 7.69 5623 1.35 2894 0.73 2312 0.65 113 0.88
40 2022-10-08 13246 2.45 677 2.95 1727 8.92 5675 1.92 2707 0.63 2319 0.95 141 2.13
41 2022-10-15 14245 3.54 695 3.45 2330 11.12 5761 2.46 3049 1.38 2284 1.53 126 1.59
42 2022-10-22 15688 4.58 799 3.38 2644 13.09 6230 3.60 3352 2.21 2551 1.72 112 3.57
43 2022-10-29 16163 6.63 929 4.20 2751 17.52 6010 6.09 3634 2.67 2680 3.10 159 3.14
44 2022-11-05 18740 7.71 964 6.64 3126 20.15 7006 7.09 4483 3.37 2993 3.31 168 1.79
45 2022-11-12 23114 7.65 1867 9.16 3986 16.88 8242 7.01 5466 3.64 3390 4.25 163 1.84
46 2022-11-19 26999 7.61 2538 6.82 4620 14.11 8721 7.41 6904 4.88 4041 5.99 175 2.86
47 2022-11-26 34079 6.71 4680 6.24 6170 9.98 9192 6.80 7726 5.14 6143 5.73 168 2.98
48 2022-12-03 36841 6.99 6110 5.35 8002 7.91 9926 6.85 7522 6.90 5091 8.15 190 1.58
49 2022-12-10 36861 7.28 6227 5.77 8179 6.32 10579 7.61 6303 8.52 5326 8.60 247 2.83
50 2022-12-17 37736 8.71 5921 6.67 8545 5.36 10522 8.33 7131 13.06 5416 11.48 201 2.49
51 2022-12-24 34257 9.27 4905 6.81 7661 5.33 9664 8.14 7106 13.68 4800 13.96 121 4.96
52 2022-12-31 32835 10.65 4669 7.90 6614 6.49 9371 8.18 6982 16.56 5119 15.06 80 5.00
1 2023-01-07 31402 10.12 5144 8.98 6297 6.45 10120 7.99 6847 16.04 2880 13.92 114 2.63

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 8428 4.41 441 3.40 944 4.45 4632 3.52 1571 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 12288 3.64 677 5.91 1319 3.64 5937 3.17 2644 2.91 1710 5.50
48 2022-12-03 12348 3.05 808 3.71 1437 1.88 6343 2.70 2804 3.50 956 5.23
49 2022-12-10 12271 3.07 962 3.64 1406 1.99 6469 2.43 2439 3.81 995 6.43
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 10992 3.31 638 2.82 1016 2.17 6309 2.92 2024 4.35 1005 5.17
1 2023-01-07 11731 3.60 802 3.12 1007 2.88 6860 2.93 2153 4.13 909 8.58

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 8440 1.79 441 2.04 955 5.76 4633 1.01 1571 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 12343 1.88 808 4.33 1453 5.09 6343 1.04 2783 1.40 956 1.88
49 2022-12-10 12262 1.70 962 2.81 1417 4.59 6469 1.07 2419 1.03 995 2.21
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 10991 1.80 638 2.04 1019 6.58 6309 1.08 2020 1.49 1005 1.99
1 2023-01-07 11742 1.88 802 3.74 1016 6.40 6862 1.12 2153 1.44 909 1.98

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 1.57 354 0.85 911 6.70 3865 0.52 1440 1.53 707 1.13
43 2022-10-29 8449 1.78 441 1.81 960 6.35 4632 0.97 1576 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 12372 1.86 808 3.22 1438 4.17 6359 0.64 2811 2.88 956 2.30
49 2022-12-10 12303 1.91 962 3.95 1407 3.55 6473 0.85 2466 2.88 995 2.11
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 11015 2.73 638 4.08 1020 3.33 6331 1.50 2021 5.89 1005 2.69
1 2023-01-07 11770 2.86 802 3.49 1009 3.27 6868 1.67 2182 5.82 909 3.74

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 - - 1179 10.18 947 16.79 394 15.48
36 2022-09-10 2817 16.22 280 21.79 - - 1089 11.20 1013 18.76 417 17.99
37 2022-09-17 3337 21.73 301 23.59 - - 1368 20.10 1101 20.62 522 24.33
38 2022-09-24 3847 23.50 334 22.16 - - 1689 22.20 1255 21.59 538 31.78
39 2022-10-01 4149 22.87 286 27.62 - - 2001 19.94 1309 22.23 521 31.67
40 2022-10-08 4488 19.32 298 20.47 - - 2235 15.84 1365 19.85 546 29.67
41 2022-10-15 5161 16.70 265 24.91 - - 2963 11.51 1305 20.15 579 28.67
42 2022-10-22 6332 12.95 354 21.47 - - 3863 7.77 1389 18.14 678 26.40
43 2022-10-29 7495 11.05 441 19.05 - - 4632 7.38 1554 13.96 814 20.64
44 2022-11-05 8272 10.23 362 23.20 - - 5245 6.43 1827 12.10 796 24.37
45 2022-11-12 9526 7.77 458 19.87 - - 5837 4.99 2415 7.99 759 19.89
46 2022-11-19 10428 6.94 575 18.43 - - 5952 4.96 2945 6.25 904 14.49
47 2022-11-26 10987 4.88 677 9.75 - - 5927 3.36 2619 4.39 1678 8.70
48 2022-12-03 10945 4.75 808 9.78 - - 6359 3.21 2774 4.83 931 10.20
49 2022-12-10 10971 4.14 962 7.59 - - 6473 2.90 2425 3.84 995 9.25
50 2022-12-17 11052 4.58 987 8.81 - - 6726 3.20 2213 4.84 1038 8.67
51 2022-12-24 10516 4.49 783 5.75 - - 6652 3.77 2125 4.89 956 7.53
52 2022-12-31 9949 4.46 638 6.11 - - 6331 3.95 2008 5.18 972 5.25
1 2023-01-07 10693 4.20 802 3.12 - - 6869 4.13 2140 4.30 882 5.44

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 7154 1.86 386 0.78 922 0.65 3451 1.45 1580 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 10719 3.95 808 2.72 1379 5.29 4787 4.24 2814 3.13 931 3.97
49 2022-12-10 10684 4.46 962 4.89 1383 4.92 4874 4.21 2470 4.29 995 5.03
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 9399 4.75 638 7.21 1016 6.69 4747 3.08 2026 3.90 972 11.01
1 2023-01-07 9894 4.44 802 10.97 1007 5.16 5022 2.95 2181 3.39 882 8.73

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