Respiratory Virus Report, Week 48 - ending December 3, 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 48 (week ending December 3, 2022) in Canada, participating RVDSS laboratories reported 11,043 detections of SARS-CoV-2 from 90,520 tests (12.2% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 10,332 to 41,411 tests), activity of influenza is highest.

  • At the national level, influenza A activity remained similar to the previous week (9,842 detections; 23.8%); however, activity remains above expected levels for this time of year.
    • There is geographic variation in influenza A activity as activity is increasing in eastern provinces and the territories, but decreasing in western provinces.
    • Influenza A accounts for nearly all influenza detections in Canada.
  • Activity of respiratory syncytial virus (RSV) has stabilized (2,392 detections; 6.8% 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.
  • 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 December 3, 2022 (surveillance week 2022-48)
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 703 129 516 0 106 13 119 0 516 18 516 0 3 2 2 0 516 16 516 24 516 43 516 6
Prince Edward Island 1145 259 189 0 21 59 80 0 189 12 59 2 2 5 2 0 59 6 59 0 59 11 59 0
Nova Scotia 5226 596 2763 0 1 718 719 0 2763 173 37 0 0 2 1 0 37 3 37 0 37 6 37 1
New Brunswick 5280 649 2925 0 13 855 868 1 2642 124 196 0 1 8 0 0 196 10 196 2 196 19 196 15
Atlantic 12354 1633 6393 0 141 1645 1786 1 6110 327 808 2 6 17 5 0 808 35 808 26 808 79 808 22
Région Nord-Est 3463 547 2025 0 0 375 375 1 908 108 64 1 0 6 0 0 64 2 64 4 N.C. N.C. 64 4
Québec-Chaudière-Appalaches 7100 639 1257 0 0 359 359 0 1261 163 361 0 0 0 0 0 373 23 361 17 N.C. N.C. 361 28
Centre-du-Québec 6545 910 1591 0 0 497 497 0 1124 76 30 0 0 1 0 0 30 2 30 4 N.C. N.C. 30 4
Montréal-Laval  7501 1090 4979 0 2 1253 1255 5 2481 164 934 3 0 7 2 0 934 39 935 30 N.C. N.C. 876 34
Ouest du Québec 5302 688 1287 0 2 461 463 0 1007 66 27 2 0 2 0 0 27 5 27 3 N.C. N.C. 27 0
Montérégie 5586 723 1284 0 0 375 375 2 1216 54 2 0 0 0 0 0 2 0 2 1 N.C. N.C. 2 0
Province of Québec 35497 4597 12423 0 4 3320 3324 8 7997 631 1418 6 0 16 2 0 1430 71 1419 59 N.C. N.C. 1360 70
P.H.O.L. - Ottawa 663 151 229 0 26 5 28 0 229 20 177 0 0 0 0 5 177 0 177 1 177 9 177 5
EORLA 2716 208 786 0 0 237 237 0 786 96 55 0 0 3 0 0 55 3 55 1 55 4 55 10
P.H.O.L. - Kingston 612 79 112 0 12 7 19 0 112 4 104 0 0 0 0 3 104 2 104 3 104 20 104 7
UHN / Mount Sinai Hospital 3021 238 795 0 6 34 40 0 795 12 28 0 0 0 0 0 28 0 28 0 28 1 28 3
P.H.O.L. - Toronto  1670 420 1320 5 311 29 178 0 1316 74 1014 0 0 0 0 43 1014 13 1014 8 1014 37 1014 45
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 2699 183 2699 2 161 107 270 0 2699 143 2283 0 0 0 0 19 2283 20 2299 9 2299 29 2297 67
P.H.O.L. - Sault Ste. Marie 58 5 41 0 7 4 10 0 41 0 37 0 0 0 0 3 37 0 37 1 37 1 37 1
P.H.O.L. - Timmins 289 16 66 0 37 2 36 0 66 0 64 0 0 0 0 2 64 2 64 1 64 2 64 2
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 902 158 392 1 85 5 90 0 392 35 348 0 0 0 0 10 348 6 348 2 348 13 348 30
P.H.O.L. - Orillia 16 8 106 0 20 6 26 0 106 16 98 0 0 0 0 11 98 1 98 0 98 5 98 8
P.H.O.L. - Thunder Bay 234 50 38 0 6 2 8 0 38 1 26 0 0 0 0 1 26 0 26 0 26 1 26 2
P.H.O.L. - Sudbury 43 9 37 0 9 0 9 0 37 2 32 0 0 0 0 2 32 2 32 1 32 2 32 1
P.H.O.L. - Hamilton 621 136 399 1 30 19 50 0 399 18 290 0 0 0 0 16 290 2 290 1 290 17 290 16
P.H.O.L. - Peterborough 154 16 46 0 10 0 10 0 46 0 46 0 0 0 0 2 46 0 46 2 46 1 46 1
St. Joseph's - Hamilton 2954 310 1570 0 0 334 334 1 1570 173 1570 0 0 42 0 0 1570 9 1570 3 1570 48 0 0
Sault Area Hospital 422 33 331 0 53 31 84 0 331 6 117 2 0 2 0 0 117 4 117 7 117 9 117 0
Province of Ontario 17074 2020 8967 9 773 822 1429 1 8963 600 6289 2 0 47 0 117 6289 64 6305 40 6305 199 4733 198
Manitoba 2919 422 2022 0 34 360 394 0 2022 80 190 0 0 8 0 0 190 7 221 11 190 29 221 10
Saskatchewan 6966 461 2143 0 0 545 545 2 1735 67 807 1 4 33 0 0 809 14 809 44 809 40 808 25
Alberta 8546 1216 4160 41 824 201 1066 1 3128 286 1644 14 3 28 0 0 1644 16 1642 17 1618 55 1644 45
Prairies 18431 2099 8325 41 858 1106 2005 3 6885 433 2641 15 7 69 0 0 2643 37 2672 72 2617 124 2673 80
British Columbia 6811 667 5146 15 317 0 1250 0 4903 398 783 6 6 19 7 0 783 14 783 19 758 77 758 32
Yukon 180 11 26 0 10 0 17 0 24 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 80 7 73 2 20 0 22 0 73 3 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 73 8 N.C. N.C.
Nunavut 93 9 58 0 9 0 9 0 58 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.
Territories 353 27 157 2 39 0 48 0 155 3 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 73 8 N.C. N.C.
CANADA 90520 11043 41411 67 2132 6893 9842 13 35013 2392 11939 31 19 168 14 117 11953 221 11987 216 10561 487 10332 402

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 December 3, 2022 (surveillance weeks 2022-35 to 2022-48)
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 7408 1794 3260 0 158 16 174 0 3260 131 3260 2 13 18 8 0 3260 74 3260 119 3260 401 3260 15
Prince Edward Island 18228 4820 894 0 89 80 169 0 894 26 720 14 22 49 4 0 720 45 720 10 720 276 720 8
Nova Scotia 67306 13521 10414 0 4 1721 1725 1 10413 713 623 4 7 13 2 0 623 26 623 0 623 148 623 5
New Brunswick 50556 7744 11484 0 62 1822 1884 3 8293 316 1130 1 16 67 7 0 1130 81 1130 4 1130 262 1075 46
Atlantic 143498 27879 26052 0 313 3639 3952 4 22860 1186 5733 21 58 147 21 0 5733 226 5733 133 5733 1087 5678 74
Région Nord-Est 36244 5075 14176 0 0 533 533 4 3639 379 413 5 2 34 0 0 413 14 413 17 N.C. N.C. 413 10
Québec-Chaudière-Appalaches 88332 8267 6343 0 0 569 569 3 6367 1017 2602 19 4 27 0 0 2781 170 2602 141 N.C. N.C. 2602 97
Centre-du-Québec 70881 9749 5975 0 0 912 912 2 5254 589 370 12 0 15 0 0 370 26 370 44 N.C. N.C. 370 11
Montréal-Laval  107312 13754 25709 0 8 3117 3125 14 17629 1658 8707 101 12 142 8 0 8716 303 8787 488 N.C. N.C. 8415 117
Ouest du Québec 54053 7486 5342 0 5 1009 1014 1 4453 550 557 18 0 43 1 0 556 99 557 27 N.C. N.C. 557 19
Montérégie 72658 8203 7401 0 0 937 937 8 7266 685 55 0 0 1 0 0 55 0 55 3 N.C. N.C. 55 1
Province of Québec 429480 52534 64946 0 13 7077 7090 32 44608 4878 12704 155 18 262 9 0 12891 612 12784 720 N.C. N.C. 12412 255
P.H.O.L. - Ottawa 15927 3915 1212 2 58 12 69 0 1212 50 1144 0 0 0 0 31 1144 1 1144 11 1144 101 1144 18
EORLA 45517 5173 5598 0 0 756 756 2 5598 652 580 6 3 16 10 0 580 25 580 14 580 160 580 33
P.H.O.L. - Kingston 17083 2801 934 0 53 14 67 1 933 56 885 0 0 0 0 39 886 17 886 9 885 141 886 30
UHN / Mount Sinai Hospital 47127 3568 7661 0 16 231 247 9 7661 73 329 0 0 1 0 0 296 1 329 0 329 13 329 24
P.H.O.L. - Toronto  31262 6020 8263 36 1535 78 658 0 8240 245 7549 0 0 0 0 362 7553 112 7550 66 7549 712 7550 180
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 37726 2510 37727 14 1019 566 1599 2 37728 1075 15531 4 0 16 0 206 15544 111 15596 38 15543 424 15440 252
P.H.O.L. - Sault Ste. Marie 1107 233 188 0 30 9 33 0 188 0 173 0 0 0 0 6 173 0 173 2 173 9 173 2
P.H.O.L. - Timmins 5271 612 355 0 95 4 95 0 354 3 352 0 0 0 0 34 352 4 352 7 352 38 352 13
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 19320 4097 2850 6 395 20 412 1 2849 213 2744 0 0 0 0 154 2745 44 2745 11 2744 265 2745 80
P.H.O.L. - Orillia 263 145 1017 4 213 14 231 0 1017 78 1009 0 0 0 0 71 1009 18 1009 9 1009 153 1009 35
P.H.O.L. - Thunder Bay 5237 1038 373 0 86 3 89 0 372 7 328 0 0 0 0 2 328 5 328 1 328 37 328 7
P.H.O.L. - Sudbury 1181 153 209 0 22 2 22 0 209 5 180 0 0 0 0 9 180 5 180 2 180 15 180 6
P.H.O.L. - Hamilton 14154 3331 2278 1 216 36 253 3 2275 214 2011 0 0 0 0 85 2011 23 2011 13 2011 190 2011 66
P.H.O.L. - Peterborough 2338 428 461 0 56 0 56 0 461 23 461 0 0 0 0 19 461 5 461 4 461 85 461 11
St. Joseph's - Hamilton 43036 6813 15086 0 0 1909 1909 7 15086 1026 15086 0 0 453 0 0 15086 114 15086 44 15086 1300 0 0
Sault Area Hospital 6797 1307 3529 0 146 85 231 0 3529 24 1182 20 0 10 0 0 1182 29 1182 54 1182 165 1182 6
Province of Ontario 351735 50329 90075 63 3940 3916 6904 28 90046 3963 50172 30 3 496 10 1038 50192 533 50274 285 50218 3942 34621 778
Manitoba 33261 7302 11909 11 115 962 1088 0 11909 349 2270 1 2 78 5 0 2270 81 2466 97 2270 476 2466 35
Saskatchewan 85771 8074 15349 0 0 2871 2871 6 11235 203 5003 11 29 223 8 0 5007 125 5009 236 5007 585 5003 136
Alberta 115372 19738 41315 311 5631 1008 6950 13 34160 1271 16688 99 49 303 18 0 16685 200 16669 146 16374 1917 16688 545
Prairies 234404 35114 68573 322 5746 4841 10909 19 57304 1823 23961 111 80 604 31 0 23962 406 24144 479 23651 2978 24157 716
British Columbia 130265 11687 44499 166 2387 12 5190 18 41603 1472 10191 106 116 338 56 6 10191 198 10191 186 9909 1976 9909 110
Yukon 3057 222 146 0 26 5 33 0 141 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 692 93 657 2 38 0 40 0 657 27 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 657 195 N.C. N.C.
Nunavut 2169 187 1133 3 189 2 194 0 1133 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 5918 502 1936 5 253 7 267 0 1931 50 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 657 195 N.C. N.C.
CANADA 1295300 178045 296081 556 12652 19492 34312 101 258352 13372 102761 423 275 1847 127 1044 102969 1975 103126 1803 90168 10178 86777 1933

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 11.92 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 23.88 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 12.20 23.77 0.19 0.04 18.07 0.76 9.40 0.03 0.15 0.01 3.18 0.08 1.20 6.83 8.92 0.02 9.47 3.11 5.72
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 4.85 18.54 8.44 20.84 12.15 16.09 3.64 7.04 0.06 7.00 2.36 4.72 1.90 1.94 0.32 2.95 1.83 2.35 1.79 1.01 0.02 2.02 0.09 0.89 3.23 3.90 0.04 3.26 0.37 1.25
48 2022-12-03 4.61 16.64 7.94 16.72 12.69 13.83 2.92 5.78 0.02 6.14 3.03 4.18 1.85 1.89 0.35 3.34 1.66 2.48 1.80 1.48 0.02 1.94 0.31 1.08 3.89 4.94 0.02 4.30 1.00 2.04

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 89968 11.83 11661 13.65 33540 11.44 16872 12.29 20302 11.57 7236 10.50 357 8.68
48 2022-12-03 90520 12.20 12354 13.22 35497 12.95 17074 11.83 18431 11.39 6811 9.79 353 7.65

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 32810 19.82 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 0.04 177 11.30 0.00
47 2022-11-26 38979 23.88 0.04 5140 24.20 0.00 9248 22.82 0.06 8427 16.67 0.04 9725 29.19 0.01 6279 26.74 0.10 160 18.75 0.00
48 2022-12-03 41411 23.77 0.03 6393 27.94 0.02 12423 26.76 0.06 8967 15.94 0.01 8325 24.08 0.04 5146 24.29 0.00 157 30.57 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 27001 7.61 2538 6.82 4620 14.11 8721 7.41 6904 4.88 4041 5.99 177 2.26
47 2022-11-26 33290 6.71 4680 6.24 6165 9.99 8425 6.80 7717 5.14 6143 5.73 160 1.88
48 2022-12-03 35013 6.83 6110 5.35 7997 7.89 8963 6.69 6885 6.29 4903 8.12 155 1.94

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 11672 3.97 575 5.91 1243 3.06 5943 3.30 2973 3.87 937 8.54
47 2022-11-26 12210 3.64 677 5.91 1318 3.64 5870 3.15 2634 2.92 1710 5.50
48 2022-12-03 11939 2.92 808 3.71 1418 1.69 6289 2.64 2641 3.45 783 4.85

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 11696 1.87 575 4.35 1265 4.66 5946 1.19 2972 1.38 937 2.45
47 2022-11-26 12224 1.90 677 3.99 1332 5.86 5871 0.95 2633 1.52 1710 1.81
48 2022-12-03 11953 1.85 808 4.33 1430 4.97 6289 1.02 2643 1.40 783 1.79

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 11677 1.89 575 3.65 1247 6.58 5955 0.27 2962 2.87 937 1.81
47 2022-11-26 12215 1.79 677 2.22 1324 6.12 5885 0.56 2618 2.02 1710 2.16
48 2022-12-03 11987 1.80 808 3.22 1419 4.16 6305 0.63 2672 2.69 783 2.43

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 10428 6.94 575 18.43 - - 5952 4.96 2945 6.25 904 14.49
47 2022-11-26 10910 4.85 677 9.75 - - 5860 3.28 2609 4.41 1678 8.70
48 2022-12-03 10561 4.61 808 9.78 - - 6305 3.16 2617 4.74 758 10.16

Positive human coronavirus (HCoV) tests

Figure 10: Positive human coronavirus (HCoV) tests (%) in Canada by region by surveillance week
Figure 10
Figure 10: Positive human coronavirus (HCoV) tests (%) in Canada by region by surveillance week
Week Week End Can Tests HCoV% Atl Tests HCoV% QC Tests HCoV% ON Tests HCoV% Pr Tests HCoV% BC Tests HCoV%
35 2022-09-03 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 10077 3.54 575 2.61 1193 3.52 4433 2.96 2971 5.02 904 2.21
47 2022-11-26 10624 3.23 677 2.66 1289 3.80 4367 3.48 2612 3.83 1678 1.43
48 2022-12-03 10332 3.89 808 2.72 1360 5.15 4733 4.18 2673 2.99 758 4.22

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