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Respiratory Virus Report, Week 47 - ending November 26, 2022

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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 47 (week ending November 26, 2022) in Canada, participating RVDSS laboratories reported 10,639 detections of SARS-CoV-2 from 89,913 tests (11.8% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 9,346 to 35,629 tests), activity of influenza is highest and increasing.

  • Influenza A activity is far above expected levels for this time of year and continues to increase (8,226 detections; 23.1% positive). Influenza A accounts for nearly all influenza detections in Canada.
  • Activity of respiratory syncytial virus (RSV) has stabilized (2,099 detections; 6.9% positive). Compared to pre-pandemic seasons, RSV activity is higher than average but within expected levels typical of this time of year.
  • 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 November 26, 2022 (surveillance week 2022-47)
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 487 102 340 0 34 3 37 0 340 16 340 0 1 0 1 0 340 12 340 13 340 21 340 3
Prince Edward Island 1184 264 111 0 21 18 39 0 111 5 69 2 2 5 0 0 69 1 69 1 69 11 69 3
Nova Scotia 5021 584 2305 0 0 605 605 0 2305 159 31 0 1 2 0 0 31 1 31 0 31 4 31 0
New Brunswick 4969 642 2384 0 24 539 563 0 1924 112 237 0 4 19 3 0 237 13 237 1 237 30 237 12
Atlantic 11661 1592 5140 0 79 1165 1244 0 4680 292 677 2 8 26 4 0 677 27 677 15 677 66 677 18
Région Nord-Est 2813 331 1349 0 0 115 115 0 519 75 49 1 0 9 0 0 49 0 49 4 N.C. N.C. 49 0
Québec-Chaudière-Appalaches 7749 591 886 0 0 135 135 2 894 146 306 2 0 5 0 0 319 25 306 25 N.C. N.C. 306 23
Centre-du-Québec 5735 694 1057 0 0 276 276 1 881 95 31 0 0 0 0 0 31 4 31 3 N.C. N.C. 31 3
Montréal-Laval   7340 1001 4018 0 1 964 965 1 2109 145 862 6 0 16 1 0 862 35 868 43 N.C. N.C. 833 18
Ouest du Québec 4577 619 937 0 0 329 329 0 770 70 35 0 0 3 1 0 34 11 35 2 N.C. N.C. 35 3
Montérégie 5346 616 974 0 0 277 277 2 973 82 4 0 0 0 0 0 4 0 4 2 N.C. N.C. 4 1
Province of Québec 33560 3852 9221 0 1 2096 2097 6 6146 613 1287 9 0 33 2 0 1299 75 1293 79 N.C. N.C. 1258 48
P.H.O.L. - Ottawa 625 133 150 2 9 6 17 0 150 12 134 0 0 0 0 4 134 0 134 0 134 8 134 5
EORLA 2779 228 749 0 0 223 223 0 749 104 37 0 0 0 4 0 37 3 37 0 37 4 37 7
P.H.O.L. - Kingston 544 60 99 0 7 3 10 1 99 12 93 0 0 0 0 8 93 0 93 0 93 10 93 10
UHN / Mount Sinai Hospital 2989 190 785 0 0 54 54 2 785 15 43 0 0 0 0 0 43 0 43 0 43 2 43 3
P.H.O.L. - Toronto   1734 476 1045 4 333 34 140 0 1044 41 786 0 0 0 0 47 786 13 786 8 786 43 786 32
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 2543 144 2543 0 162 127 289 0 2543 139 2194 0 0 0 0 19 2194 15 2208 6 2184 24 2207 55
P.H.O.L. - Sault Ste. Marie 51 8 39 0 6 11 17 0 39 0 32 0 0 0 0 2 32 0 32 1 32 0 32 0
P.H.O.L. - Timmins 278 16 76 0 12 22 34 0 76 2 76 0 0 0 0 12 76 0 76 0 76 2 76 1
St. Joseph's - London   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.
P.H.O.L. - London 961 164 402 0 72 4 75 0 402 41 358 0 0 0 0 24 358 5 358 3 358 22 358 14
P.H.O.L. - Orillia 15 9 106 0 28 4 32 0 106 12 106 0 0 0 0 6 106 3 106 1 106 8 106 4
P.H.O.L. - Thunder Bay 162 57 44 0 11 0 11 0 44 2 36 0 0 0 0 0 36 0 36 1 36 1 36 1
P.H.O.L. - Sudbury 52 14 45 0 4 5 9 0 45 1 32 0 0 0 0 4 32 1 32 0 32 0 32 0
P.H.O.L. - Hamilton 554 131 327 0 46 8 54 0 327 50 255 0 0 0 0 11 255 2 255 2 255 7 255 20
P.H.O.L. - Peterborough 90 10 31 0 9 0 9 0 31 2 31 0 0 0 0 1 31 0 31 0 31 1 31 0
St. Joseph's - Hamilton 3011 370 1517 0 0 366 366 0 1517 136 1517 0 0 38 0 0 1517 11 1517 0 1517 52 0 0
Sault Area Hospital 481 64 470 0 33 33 66 0 470 4 139 4 0 1 0 0 139 3 139 11 139 8 139 0
Province of Ontario 16869 2074 8428 6 732 900 1406 3 8427 573 5869 4 0 39 4 138 5869 56 5883 33 5859 192 4365 152
Manitoba 2842 400 1914 2 26 382 410 0 1914 43 175 0 0 12 1 0 175 10 211 7 175 19 211 9
Saskatchewan 7187 489 1986 0 0 582 582 1 1573 42 637 1 3 20 0 0 637 13 637 23 637 34 631 24
Alberta 10207 1441 4541 85 1058 294 1437 0 3478 242 1509 6 3 28 1 0 1508 15 1509 18 1496 48 1509 58
Prairies 20236 2330 8441 87 1084 1258 2429 1 6965 327 2321 7 6 60 2 0 2320 38 2357 48 2308 101 2351 91
British Columbia 7230 760 4248 26 299 0 1026 6 4112 291 727 14 12 31 4 0 727 25 727 23 695 102 695 17
Yukon 167 5 11 0 1 5 6 0 11 0 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 89 21 85 0 11 0 11 0 85 2 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 85 10 N.C. N.C.
Nunavut 101 5 55 0 7 0 7 0 55 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.
Territories 357 31 151 0 19 5 24 0 151 3 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 85 10 N.C. N.C.
CANADA 89913 10639 35629 119 2214 5424 8226 16 30481 2099 10881 36 26 189 16 138 10892 221 10937 198 9624 471 9346 326

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.

Non-SARS-CoV-2 specimens and select SARS-CoV-2 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 November 26, 2022 (surveillance weeks 2022-35 to 2022-47)
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 6705 1665 2744 0 52 3 55 0 2744 113 2744 2 10 16 6 0 2744 58 2744 95 2744 358 2744 9
Prince Edward Island 17083 4561 705 0 68 21 89 0 705 14 661 12 20 44 2 0 661 39 661 10 661 265 661 8
Nova Scotia 62080 12925 7651 0 3 1003 1006 1 7650 540 586 4 7 11 1 0 586 23 586 0 586 142 586 4
New Brunswick 45276 7095 8559 0 49 967 1016 2 5651 192 934 1 15 59 7 0 934 71 934 2 934 243 879 31
Atlantic 131144 26246 19659 0 172 1994 2166 3 16750 859 4925 19 52 130 16 0 4925 191 4925 107 4925 1008 4870 52
Région Nord-Est 32783 4527 12150 0 0 158 158 3 2729 271 347 4 2 28 0 0 347 12 347 13 N.C. N.C. 347 6
Québec-Chaudière-Appalaches 81232 7628 5071 0 0 208 208 3 5091 851 2232 19 4 27 0 0 2397 147 2232 123 N.C. N.C. 2232 69
Centre-du-Québec 64352 8852 4390 0 0 414 414 2 4134 515 340 12 0 14 0 0 340 23 340 40 N.C. N.C. 340 6
Montréal-Laval   99804 12664 20744 0 6 1863 1869 9 15170 1493 7751 95 12 134 6 0 7760 262 7832 457 N.C. N.C. 7519 83
Ouest du Québec 48763 6800 4057 0 3 549 552 1 3448 484 530 16 0 41 1 0 529 94 530 24 N.C. N.C. 530 19
Montérégie 67071 7483 6117 0 0 562 562 6 6050 631 53 0 0 1 0 0 53 0 53 2 N.C. N.C. 53 1
Province of Québec 394005 47954 52529 0 9 3754 3763 24 36622 4245 11253 146 18 245 7 0 11426 538 11334 659 N.C. N.C. 11021 184
P.H.O.L. - Ottawa 15264 3764 983 2 32 7 41 0 983 30 967 0 0 0 0 26 967 1 967 10 967 92 967 13
EORLA 42801 4965 4812 0 0 519 519 2 4812 556 525 6 3 13 10 0 525 22 525 13 525 156 525 23
P.H.O.L. - Kingston 16471 2722 822 0 41 7 48 1 822 52 782 0 0 0 0 36 782 15 782 6 782 121 782 23
UHN / Mount Sinai Hospital 44106 3330 6866 0 10 197 207 9 6866 61 301 0 0 1 0 0 268 1 301 0 301 12 301 21
P.H.O.L. - Toronto   29589 5600 6943 31 1221 52 480 0 6926 171 6537 0 0 0 0 319 6539 99 6536 58 6537 675 6536 135
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 35027 2327 35028 12 858 459 1329 2 35029 932 13248 4 0 16 0 187 13261 91 13297 29 13244 395 13143 185
P.H.O.L. - Sault Ste. Marie 1049 228 148 0 10 14 24 0 148 0 136 0 0 0 0 3 136 0 136 1 136 8 136 1
P.H.O.L. - Timmins 4982 596 289 0 36 24 59 0 288 3 288 0 0 0 0 32 288 2 288 6 288 36 288 11
St. Joseph's - London   58389 8185 2334 0 0 177 177 3 2334 219 628 0 0 0 0 20 662 19 662 0 662 134 251 15
P.H.O.L. - London 18418 3939 2458 5 310 15 322 1 2458 178 2397 0 0 0 0 144 2397 38 2397 9 2397 252 2397 50
P.H.O.L. - Orillia 247 137 911 4 193 8 205 0 911 62 911 0 0 0 0 60 911 17 911 9 911 148 911 27
P.H.O.L. - Thunder Bay 5003 988 335 0 80 1 81 0 334 6 300 0 0 0 0 1 300 5 300 1 300 36 300 5
P.H.O.L. - Sudbury 1138 144 172 0 5 8 13 0 172 3 148 0 0 0 0 7 148 3 148 1 148 13 148 5
P.H.O.L. - Hamilton 13533 3195 1879 0 186 17 203 3 1876 196 1721 0 0 0 0 69 1721 21 1721 12 1721 173 1721 50
P.H.O.L. - Peterborough 2184 412 415 0 46 0 46 0 415 23 415 0 0 0 0 17 415 5 415 2 415 84 415 10
St. Joseph's - Hamilton 40082 6503 13516 0 0 1575 1575 6 13516 853 13516 0 0 411 0 0 13516 105 13516 41 13516 1252 0 0
Sault Area Hospital 6375 1274 3198 0 93 54 147 0 3198 18 1065 18 0 8 0 0 1065 25 1065 47 1065 156 1065 6
Province of Ontario 334658 48309 81109 54 3121 3134 5476 27 81088 3363 43885 28 3 449 10 921 43901 469 43967 245 43915 3743 29886 580
Manitoba 30342 6880 9802 11 81 603 695 0 9802 243 1995 1 2 70 5 0 1995 74 2244 86 1995 447 2244 25
Saskatchewan 78805 7613 11259 0 0 2017 2017 4 9406 135 4196 10 25 190 8 0 4198 111 4200 192 4198 545 4195 111
Alberta 106745 18491 36338 246 4550 793 5589 12 30421 942 14779 85 46 273 18 0 14776 182 14762 121 14503 1848 14779 491
Prairies 215892 32984 57399 257 4631 3413 8301 16 49629 1320 20970 96 73 533 31 0 20969 367 21206 399 20696 2840 21218 627
British Columbia 123447 11020 37320 142 1675 12 3287 18 34667 1013 8422 96 105 303 41 6 8422 178 8422 153 8165 1855 8165 71
Yukon 2877 211 109 0 5 5 10 0 106 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 612 86 584 0 18 0 18 0 584 24 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 584 187 N.C. N.C.
Nunavut 2076 178 1075 3 180 2 185 0 1075 22 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 5565 475 1768 3 203 7 213 0 1765 47 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 584 187 N.C. N.C.
CANADA 1204711 166988 249784 456 9811 12314 23206 88 220521 10847 89455 385 251 1660 105 927 89643 1743 89854 1563 78285 9633 75160 1514

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.

Non-SARS-CoV-2 specimens and select SARS-CoV-2 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 1.46 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 2.41 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 5.58 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 10.85 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 15.91 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 11.91 19.82 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 11.83 23.09 0.13 0.03 15.24 1.25 6.91 0.04 0.07 0.04 2.13 0.13 0.80 6.89 8.10 0.03 8.69 1.79 4.46
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 6.97 21.37 9.02 22.77 15.28 19.27 3.98 8.29 0.04 5.72 1.62 4.19 1.88 2.51 0.30 2.90 1.99 2.53 1.87 0.99 0.04 1.43 0.18 0.79 3.55 2.99 0.03 3.32 0.46 1.25
47 2022-11-26 4.89 18.54 8.44 20.84 12.15 16.09 3.72 7.04 0.06 7.00 2.36 4.72 2.03 1.94 0.32 2.95 1.83 2.35 1.81 1.01 0.02 2.02 0.09 0.89 3.49 3.90 0.04 3.26 0.37 1.25

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 90420 11.91 10650 13.65 30753 11.14 21425 12.63 20598 12.18 6639 9.79 355 7.61
47 2022-11-26 89913 11.83 11661 13.65 33560 11.48 16869 12.29 20236 11.51 7230 10.51 357 8.68

Positive influenza (Flu) tests

Figure 4: Positive influenza (Flu) tests (%) in Canada by region by surveillance week
Figure 3
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 12651 0.17 0.02 932 0.11 0.11 2404 0.17 0.04 4621 0.11 0.00 2573 0.31 0.04 2006 0.20 0.00 115 0.00 0.00
36 2022-09-10 12500 0.14 0.04 906 0.00 0.00 2520 0.12 0.00 4367 0.16 0.02 2566 0.16 0.08 2055 0.19 0.10 86 0.00 0.00
37 2022-09-17 13368 0.24 0.01 854 0.12 0.00 2618 0.19 0.04 4729 0.32 0.02 2798 0.18 0.00 2247 0.22 0.00 122 0.82 0.00
38 2022-09-24 14059 0.49 0.02 788 0.13 0.00 2714 0.22 0.04 5153 0.39 0.00 3044 0.43 0.03 2226 1.21 0.04 134 1.49 0.00
39 2022-10-01 14373 0.70 0.03 688 0.29 0.15 2873 0.21 0.10 5156 0.72 0.02 3132 0.64 0.00 2411 1.33 0.00 113 3.54 0.00
40 2022-10-08 14355 1.00 0.03 818 0.24 0.00 2339 0.21 0.00 5546 1.05 0.05 3081 0.88 0.03 2430 1.85 0.00 141 4.26 0.00
41 2022-10-15 15866 1.47 0.01 776 1.68 0.00 3275 0.49 0.00 5630 1.92 0.00 3519 1.02 0.03 2540 1.85 0.00 126 10.32 0.00
42 2022-10-22 17229 2.45 0.05 1001 2.60 0.00 3608 0.86 0.03 5930 3.25 0.08 3804 2.18 0.03 2774 2.45 0.07 112 18.75 0.00
43 2022-10-29 18050 5.62 0.03 969 3.72 0.00 3821 1.41 0.08 5852 8.30 0.02 4222 7.20 0.00 3026 3.34 0.07 160 20.63 0.00
44 2022-11-05 21232 10.85 0.03 1209 8.02 0.00 4458 3.45 0.02 7006 11.28 0.04 5278 18.09 0.02 3111 8.07 0.06 170 33.53 0.00
45 2022-11-12 26268 15.91 0.04 2145 11.38 0.05 5731 7.47 0.07 8254 13.28 0.04 6468 28.08 0.03 3507 16.03 0.03 163 19.63 0.00
46 2022-11-19 32494 19.82 0.05 3433 14.54 0.00 6947 13.73 0.04 8727 14.32 0.07 8473 30.70 0.06 4739 23.53 0.04 175 11.43 0.00
47 2022-11-26 35629 23.09 0.04 5140 24.20 0.00 9221 22.74 0.07 8428 16.68 0.04 8441 28.78 0.01 4248 24.15 0.14 151 15.89 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 11467 1.13 832 1.44 1737 3.51 4621 0.50 2367 0.68 1795 0.50 115 7.83
36 2022-09-10 11305 1.13 785 0.64 1737 2.71 4367 1.01 2415 0.54 1915 0.73 86 5.81
37 2022-09-17 12160 1.05 721 0.97 1851 3.51 4729 0.61 2610 0.61 2127 0.38 122 2.46
38 2022-09-24 12873 1.44 707 1.13 1908 5.56 5153 1.03 2821 0.35 2150 0.33 134 1.49
39 2022-10-01 13059 2.19 556 3.06 2029 7.69 5155 1.47 2894 0.73 2312 0.65 113 0.88
40 2022-10-08 13116 2.48 677 2.95 1727 8.92 5545 1.97 2707 0.63 2319 0.95 141 2.13
41 2022-10-15 14114 3.57 695 3.45 2330 11.12 5630 2.52 3049 1.38 2284 1.53 126 1.59
42 2022-10-22 15388 4.66 799 3.38 2644 13.09 5930 3.74 3352 2.21 2551 1.72 112 3.57
43 2022-10-29 16002 6.69 929 4.20 2751 17.52 5849 6.24 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 26992 7.61 2538 6.82 4650 14.04 8724 7.40 6866 4.91 4039 5.99 175 2.29
47 2022-11-26 30481 6.89 4680 6.24 6146 9.97 8427 6.80 6965 4.69 4112 7.08 151 1.99

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 3393 2.83 294 0.34 619 2.75 1111 3.33 967 2.69 402 3.73
36 2022-09-10 3410 3.26 280 5.36 646 3.87 1037 3.09 1025 2.44 422 3.32
37 2022-09-17 3905 3.07 301 5.65 661 3.33 1300 3.54 1112 2.07 530 2.26
38 2022-09-24 4521 2.41 334 1.80 717 2.65 1649 2.61 1274 1.73 547 3.47
39 2022-10-01 4818 3.13 286 1.75 728 4.81 1939 3.71 1327 1.81 538 2.79
40 2022-10-08 4972 3.72 298 2.35 578 6.40 2143 2.94 1386 3.68 567 4.76
41 2022-10-15 5931 3.56 265 5.28 851 4.70 2893 3.11 1323 3.40 599 3.67
42 2022-10-22 7155 4.23 354 3.39 904 4.09 3770 3.58 1420 4.72 707 7.36
43 2022-10-29 8341 4.42 441 3.40 944 4.45 4545 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 11634 3.98 575 5.91 1241 3.06 5946 3.30 2936 3.92 935 8.56
47 2022-11-26 10881 3.72 677 5.91 1287 3.42 5869 3.15 2321 3.23 727 8.39

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 3432 2.30 294 6.12 632 2.53 1139 0.79 965 2.69 402 2.49
36 2022-09-10 3434 2.18 280 3.57 659 3.03 1045 1.05 1028 2.43 422 2.13
37 2022-09-17 3923 2.12 301 4.65 679 3.09 1301 1.46 1111 1.35 530 2.64
38 2022-09-24 4536 1.57 334 1.20 731 3.42 1649 0.97 1275 1.41 547 1.46
39 2022-10-01 4834 2.21 286 2.80 742 4.18 1941 1.34 1327 2.11 538 2.60
40 2022-10-08 4983 1.79 298 4.03 583 5.66 2149 1.12 1386 1.23 567 0.53
41 2022-10-15 5946 2.03 265 3.77 864 4.63 2895 0.93 1323 2.12 599 2.67
42 2022-10-22 7166 1.63 354 1.98 915 4.04 3770 0.80 1420 1.69 707 2.69
43 2022-10-29 8353 1.80 441 2.04 955 5.76 4546 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 11655 1.88 575 4.35 1263 4.67 5946 1.19 2935 1.40 935 2.46
47 2022-11-26 10892 2.03 677 3.99 1299 5.77 5869 0.95 2320 1.64 727 3.44

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 3452 1.83 294 2.38 619 2.91 1139 0.97 998 1.90 402 1.99
36 2022-09-10 3445 1.83 280 1.79 649 3.39 1045 0.96 1049 1.72 422 1.90
37 2022-09-17 3924 1.38 301 2.66 665 3.31 1300 0.46 1127 0.80 530 1.70
38 2022-09-24 4535 1.61 334 0.90 723 4.98 1646 0.49 1285 1.48 547 1.28
39 2022-10-01 4835 1.45 286 1.75 729 4.53 1941 0.46 1341 1.04 538 1.67
40 2022-10-08 5011 1.42 298 1.01 581 5.34 2151 0.37 1414 1.27 567 1.94
41 2022-10-15 5960 1.64 265 1.89 857 6.07 2895 0.35 1344 1.26 599 2.34
42 2022-10-22 7188 1.54 354 0.85 911 6.70 3776 0.45 1440 1.53 707 1.13
43 2022-10-29 8362 1.70 441 1.81 960 6.35 4545 0.81 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 11670 1.87 575 3.65 1247 6.58 5955 0.27 2957 2.77 935 1.82
47 2022-11-26 10937 1.81 677 2.22 1293 6.11 5883 0.56 2357 2.04 727 3.16

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 2805 15.54 294 30.27 - - 1139 10.18 947 16.79 394 15.48
36 2022-09-10 2773 16.16 280 21.79 - - 1045 10.81 1013 18.76 417 17.99
37 2022-09-17 3269 21.87 301 23.59 - - 1300 20.38 1101 20.62 522 24.33
38 2022-09-24 3779 23.42 334 22.16 - - 1621 21.96 1255 21.59 538 31.78
39 2022-10-01 4089 22.79 286 27.62 - - 1941 19.68 1309 22.23 521 31.67
40 2022-10-08 4403 19.26 298 20.47 - - 2150 15.58 1365 19.85 546 29.67
41 2022-10-15 5094 16.67 265 24.91 - - 2896 11.33 1305 20.15 579 28.67
42 2022-10-22 6243 12.91 354 21.47 - - 3774 7.58 1389 18.14 678 26.40
43 2022-10-29 7408 11.07 441 19.05 - - 4545 7.35 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 10392 6.97 575 18.43 - - 5955 4.95 2908 6.33 902 14.52
47 2022-11-26 9624 4.89 677 9.75 - - 5859 3.28 2308 4.38 695 14.68

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 2778 0.54 294 0.68 610 0.66 483 0.62 997 0.20 394 1.02
36 2022-09-10 2833 0.39 280 0.71 639 0.16 451 0.22 1046 0.67 417 0.00
37 2022-09-17 3196 0.28 301 0.00 654 0.31 590 0.51 1128 0.35 522 0.00
38 2022-09-24 3648 0.33 334 0.00 705 0.57 785 0.25 1286 0.47 538 0.00
39 2022-10-01 3974 0.60 286 0.35 716 0.84 1110 0.36 1341 0.75 521 0.58
40 2022-10-08 3994 0.95 298 1.01 568 0.35 1168 0.60 1414 1.27 546 1.47
41 2022-10-15 4855 0.99 265 0.38 842 1.07 1822 0.49 1347 2.00 579 0.35
42 2022-10-22 5937 1.18 354 0.00 884 1.02 2582 0.81 1439 2.50 678 0.59
43 2022-10-29 7067 1.87 386 0.78 922 0.65 3364 1.46 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 10070 3.55 575 2.61 1193 3.52 4433 2.96 2966 5.02 902 2.22
47 2022-11-26 9346 3.49 677 2.66 1258 3.82 4365 3.48 2351 3.87 695 2.45

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