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Respiratory Virus Report, Week 49 - ending December 10, 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 49 (week ending December 10, 2022) in Canada, participating RVDSS laboratories reported 11,793 detections of SARS-CoV-2 from 93,704 tests (12.6% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 10,684 to 43,589 tests), activity of influenza is highest and remains slightly above expected levels for this time of year.

  • At the national level, influenza A activity is showing signs of decrease (9,365 detections; 21.5%).
    • Influenza A accounts for nearly all influenza detections in Canada.
  • Activity of respiratory syncytial virus (RSV) has stabilized (2,683 detections; 7.3% positive). Compared to pre-pandemic seasons, RSV activity is 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.
  • 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 December 10, 2022 (surveillance week 2022-49)
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 853 117 674 0 51 160 211 0 674 22 674 1 4 3 4 0 674 15 674 35 674 37 674 30
Prince Edward Island 1058 232 214 0 10 62 72 0 214 14 66 1 2 8 1 0 66 2 66 1 66 4 66 0
Nova Scotia 5150 614 2779 0 0 778 778 0 2779 176 26 0 0 1 0 0 26 3 26 0 26 3 26 0
New Brunswick 6384 895 3737 0 17 1036 1053 0 2560 147 196 2 2 6 0 0 196 7 196 2 196 29 196 17
Atlantic 13445 1858 7404 0 78 2036 2114 0 6227 359 962 4 8 18 5 0 962 27 962 38 962 73 962 47
Région Nord-Est 4138 637 2290 0 0 614 614 0 1132 112 50 0 0 3 0 0 50 1 47 3 N.C. N.C. 50 6
Québec-Chaudière-Appalaches 7468 790 1630 0 0 539 539 5 1630 148 366 1 0 4 0 0 377 27 366 15 N.C. N.C. 366 24
Centre-du-Québec 6032 900 1022 0 0 324 324 3 870 45 31 0 0 0 0 0 31 4 31 2 N.C. N.C. 31 1
Montréal-Laval  7043 984 5068 0 0 1032 1032 7 2438 107 930 5 0 11 1 0 930 26 934 26 N.C. N.C. 907 36
Ouest du Québec 4556 604 1315 0 1 369 370 2 1027 61 27 1 0 2 0 0 27 7 27 4 N.C. N.C. 27 1
Montérégie 5659 748 1266 0 0 278 278 1 1082 44 2 0 0 0 0 0 2 0 2 0 N.C. N.C. 2 0
Province of Québec 34896 4663 12591 0 1 3156 3157 18 8179 517 1406 7 0 20 1 0 1417 65 1407 50 N.C. N.C. 1383 68
P.H.O.L. - Ottawa 721 162 242 1 16 29 44 0 242 25 167 0 0 0 0 2 167 1 167 0 167 9 167 3
EORLA 2870 240 908 0 0 235 235 0 908 79 41 0 0 1 6 0 41 2 41 1 41 2 41 11
P.H.O.L. - Kingston 615 62 95 2 6 8 16 0 95 4 80 0 0 0 0 4 80 0 80 0 80 2 80 4
UHN / Mount Sinai Hospital 2850 254 803 1 15 14 30 0 803 21 29 0 0 1 0 0 29 0 29 0 29 1 29 5
P.H.O.L. - Toronto  2045 494 1338 3 362 13 137 0 1337 137 1022 0 0 0 0 33 1022 9 1022 12 1022 44 1022 56
Sick Kids Hospital - Toronto N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R.
Shared Hospital Laboratory 2673 163 2673 4 127 79 210 4 2673 155 2243 0 0 0 0 19 2243 21 2247 10 2247 32 2244 62
P.H.O.L. - Sault Ste. Marie 49 0 50 0 7 1 7 0 50 0 32 0 0 0 0 1 32 0 32 3 32 0 32 0
P.H.O.L. - Timmins 282 25 73 0 32 2 29 0 73 1 67 0 0 0 0 1 67 2 67 0 67 4 67 0
St. Joseph's - London  3602 313 1013 0 0 161 161 1 1013 91 56 0 0 0 0 4 56 2 56 0 56 3 56 6
P.H.O.L. - London 1029 241 517 0 65 15 74 0 517 50 410 0 0 0 0 22 410 3 410 2 410 7 410 29
P.H.O.L. - Orillia 36 21 126 0 15 6 21 0 126 21 107 0 0 0 0 5 107 4 107 0 107 5 107 4
P.H.O.L. - Thunder Bay 192 44 60 0 12 2 14 0 60 7 41 0 0 0 0 1 41 3 41 0 41 1 41 1
P.H.O.L. - Sudbury 31 9 32 1 11 1 12 0 32 5 31 0 0 0 0 4 31 0 31 1 31 1 31 3
P.H.O.L. - Hamilton 673 142 468 0 18 16 34 0 468 28 279 0 0 0 0 10 279 5 279 2 279 15 279 14
P.H.O.L. - Peterborough 76 15 45 0 5 6 11 0 45 5 38 0 0 0 0 1 38 0 38 1 38 3 38 2
St. Joseph's - Hamilton 2915 371 1596 0 0 252 252 1 1596 170 1596 0 0 34 0 0 1596 16 1596 9 1596 48 0 0
Sault Area Hospital 555 51 541 0 58 47 105 0 541 6 230 2 0 6 0 0 230 1 230 14 230 11 230 5
Province of Ontario 21214 2607 10580 12 749 887 1392 6 10579 805 6469 2 0 42 6 107 6469 69 6473 55 6473 188 4874 205
Manitoba 2359 248 1505 2 31 377 410 0 1505 82 170 0 0 6 1 0 153 4 201 6 170 16 201 7
Saskatchewan 6493 427 1871 0 0 376 376 0 1476 80 684 0 2 28 0 0 682 3 682 31 682 18 684 39
Alberta 7697 1090 4065 50 427 263 740 2 3322 375 1585 5 4 46 1 0 1584 18 1583 34 1573 59 1585 60
Prairies 16549 1765 7441 52 458 1016 1526 2 6303 537 2439 5 6 80 2 0 2419 25 2466 71 2425 93 2470 106
British Columbia 7196 882 5326 23 340 17 1082 2 5326 458 995 6 11 38 9 0 995 22 995 21 995 92 995 50
Yukon 149 3 72 0 0 0 35 0 72 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 135 11 116 0 48 0 48 0 116 4 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 116 8 N.C. N.C.
Nunavut 120 4 59 0 11 0 11 0 59 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 404 18 247 0 59 0 94 0 247 7 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 116 8 N.C. N.C.
CANADA 93704 11793 43589 87 1685 7112 9365 28 36861 2683 12271 24 25 198 23 107 12262 208 12303 235 10971 454 10684 476

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 December 10, 2022 (surveillance weeks 2022-35 to 2022-49)
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 8261 1911 3934 0 209 176 385 0 3934 153 3934 3 17 21 12 0 3934 89 3934 154 3934 438 3934 45
Prince Edward Island 19286 5052 1108 0 99 142 241 0 1108 40 786 15 24 57 5 0 786 47 786 11 786 280 786 8
Nova Scotia 72456 14135 13193 0 4 2499 2503 1 13192 889 649 4 7 14 2 0 649 29 649 0 649 151 649 5
New Brunswick 56940 8639 15221 0 79 2858 2937 3 10853 463 1326 3 18 73 7 0 1326 88 1326 6 1326 291 1271 63
Atlantic 156943 29737 33456 0 391 5675 6066 4 29087 1545 6695 25 66 165 26 0 6695 253 6695 171 6695 1160 6640 121
Région Nord-Est 40378 5709 16469 0 0 1149 1149 3 4772 491 464 5 2 37 0 0 464 15 461 20 N.C. N.C. 464 16
Québec-Chaudière-Appalaches 95800 9057 7986 0 0 1112 1112 8 8010 1165 2976 20 4 31 0 0 3170 199 2976 157 N.C. N.C. 2976 121
Centre-du-Québec 76979 10657 6988 0 0 1234 1234 5 6116 632 398 12 0 15 0 0 398 31 398 46 N.C. N.C. 398 12
Montréal-Laval  114358 14738 30773 0 8 4160 4168 21 20063 1769 9653 108 12 155 9 0 9662 330 9737 515 N.C. N.C. 9338 156
Ouest du Québec 58596 8088 6658 0 6 1378 1384 3 5480 611 580 18 0 45 1 0 579 105 580 30 N.C. N.C. 580 20
Montérégie 78312 8949 8675 0 0 1224 1224 9 8356 729 59 0 0 1 0 0 59 0 59 3 N.C. N.C. 59 1
Province of Québec 464423 57198 77549 0 14 10257 10271 49 52797 5397 14130 163 18 284 10 0 14332 680 14211 771 N.C. N.C. 13815 326
P.H.O.L. - Ottawa 16648 4077 1454 3 74 41 113 0 1454 75 1311 0 0 0 0 33 1311 2 1311 11 1311 110 1311 21
EORLA 48387 5413 6506 0 0 991 991 2 6506 731 621 6 3 17 16 0 621 27 621 15 621 162 621 44
P.H.O.L. - Kingston 17698 2863 1029 2 59 22 83 1 1028 60 966 0 0 0 0 43 967 17 967 9 966 143 967 34
UHN / Mount Sinai Hospital 49977 3822 8464 1 31 245 277 9 8464 94 358 0 0 2 0 0 325 1 358 0 358 14 358 29
P.H.O.L. - Toronto 33308 6514 9601 39 1897 91 795 0 9578 382 8572 0 0 0 0 395 8575 121 8572 78 8572 756 8572 236
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 40399 2673 40400 18 1146 645 1809 6 40401 1230 17774 4 0 16 0 225 17787 132 17843 48 17790 456 17684 314
P.H.O.L. - Sault Ste. Marie 1156 233 238 0 37 10 40 0 238 0 205 0 0 0 0 7 205 0 205 5 205 9 205 2
P.H.O.L. - Timmins 5553 637 428 0 127 6 124 0 427 4 419 0 0 0 0 35 419 6 419 7 419 42 419 13
St. Joseph's - London 69640 9219 5076 0 0 607 607 5 5076 442 803 0 0 0 0 32 837 23 837 1 837 149 426 29
P.H.O.L. - London 20349 4338 3367 6 460 35 486 1 3366 263 3154 0 0 0 0 176 3155 47 3155 13 3154 272 3155 109
P.H.O.L. - Orillia 299 166 1143 4 228 20 252 0 1143 99 1116 0 0 0 0 76 1116 22 1116 9 1116 158 1116 39
P.H.O.L. - Thunder Bay 5429 1082 433 0 98 5 103 0 432 14 369 0 0 0 0 3 369 8 369 1 369 38 369 8
P.H.O.L. - Sudbury 1212 162 241 1 33 3 34 0 241 10 211 0 0 0 0 13 211 5 211 3 211 16 211 9
P.H.O.L. - Hamilton 14827 3473 2746 1 235 51 287 3 2743 242 2290 0 0 0 0 95 2290 28 2290 15 2290 205 2290 80
P.H.O.L. - Peterborough 2414 443 506 0 61 6 67 0 506 28 499 0 0 0 0 20 499 5 499 5 499 88 499 13
St. Joseph's - Hamilton 45951 7184 16682 0 0 2161 2161 8 16682 1196 16682 0 0 487 0 0 16682 130 16682 53 16682 1348 0 0
Sault Area Hospital 7352 1358 4070 0 204 132 336 0 4070 30 1412 22 0 16 0 0 1412 30 1412 68 1412 176 1412 11
Province of Ontario 380599 53657 102384 75 4690 5071 8565 35 102355 4900 56762 32 3 538 16 1153 56781 604 56867 341 56812 4142 39615 991
Manitoba 35620 7550 13446 13 146 1368 1527 0 13446 445 2472 1 2 84 6 0 2423 85 2667 103 2472 492 2667 42
Saskatchewan 92264 8501 17416 0 0 3296 3296 6 12803 286 5687 11 31 251 8 0 5689 128 5691 267 5689 603 5687 175
Alberta 123125 20871 45953 400 6165 1255 7820 15 38004 1715 18414 104 54 355 19 0 18409 220 18391 189 18082 1986 18414 613
Prairies 251009 36922 76815 413 6311 5919 12643 21 64253 2446 26573 116 87 690 33 0 26521 433 26749 559 26243 3081 26768 830
British Columbia 137468 12569 50013 201 3086 142 6306 20 47117 1947 11359 115 127 381 69 6 11359 224 11359 210 11077 2086 11077 165
Yukon 3206 225 257 0 0 0 81 0 254 5 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Northwest Territories 827 104 773 2 86 0 88 0 773 31 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 773 203 N.C. N.C.
Nunavut 2289 191 1192 3 200 2 205 0 1192 24 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 6322 520 2222 5 286 2 374 0 2219 60 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 773 203 N.C. N.C.
CANADA 1396764 190603 342439 694 14778 27066 44225 129 297828 16295 115519 451 301 2058 154 1159 115688 2194 115881 2052 101600 10672 97915 2433

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
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

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

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

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

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

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

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

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

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

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