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Respiratory Virus Report, Week 17 - ending April 30, 2022

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Organization: Public Health Agency of Canada

In this Respiratory Virus Report, the number of detections of coronavirus reflects only seasonal human coronaviruses, not the novel pandemic coronavirus (SARS-CoV-2) that causes COVID-19. For information on COVID-19, see the Coronavirus disease (COVID-19): Outbreak update

Overall Summary

Detections of seasonal respiratory viruses have increased since February 2022, with influenza accounting for most of the increase in recent weeks. Activity of most respiratory viruses is within or below expected levels for this time of year.

  • Influenza is the most common seasonal respiratory virus detected in Canada. Influenza activity was above the seasonal threshold of 5% positivity in week 17, indicating the beginning of the influenza season at the national level.
    • A total of 1,639 influenza detections were reported (1,637 influenza A, 2 influenza B).
    • Activity of influenza A (9.6% positive) continues to increase, and is above average levels for this time of year.
  • Activity of other respiratory viruses is low; however, activity of seasonal human coronavirus (177 detections; 4.9% positive) has increased in recent weeks and is slightly above expected levels.
  • The number of tests performed for all viruses were above expected levels.
  • 31/34 sentinel laboratories reported surveillance data.

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Abbreviations:
Flu
Influenza
A(H1)pdm09
Influenza A(H1N1)pdm09
A(H3)
Influenza A(H3N2)
A(UnS)
Influenza A(Unsubtyped)
RSV
Respiratory syncytial virus
HPIV
Human parainfluenza virus
HMPV
Human metapneumovirus
ADV
Adenovirus
EV/RV
Enterovirus/Rhinovirus
HCoV
Human coronavirus
Atl
Atlantic Canada
BC
British Columbia
Can
Canada
EORLA
Eastern Ontario Regional Laboratory Association
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
Terr
Territories of Canada
UHN
University Health Network

Respiratory virus detections

Table 1: Respiratory virus detections for the week ending April 30, 2022 (surveillance week 2022-17)
Reporting Laboratory 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 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.C. N.C.
Prince Edward Island 50 0 3 4 7 0 50 9 50 0 0 2 0 0 50 1 50 13 50 11 50 4
Nova Scotia 586 0 0 17 17 1 592 0 26 0 0 0 1 0 26 0 26 1 26 3 26 1
New Brunswick 355 0 1 3 4 0 268 3 26 0 0 0 1 0 26 1 26 4 26 2 26 0
Atlantic 991 0 4 24 28 1 910 12 102 0 0 2 2 0 102 2 102 18 102 16 102 5
Région Nord-Est 1486 10 0 295 305 0 860 4 3 0 0 0 0 0 3 0 9 3 N.C. N.C. 9 2
Québec-Chaudière-Appalaches 740 0 0 208 208 0 747 4 28 0 0 0 0 0 250 10 249 6 N.C. N.C. 115 16
Centre-du-Québec 649 0 2 145 147 1 520 1 291 0 0 0 0 0 291 2 291 1 N.C. N.C. 291 0
Montréal-Laval 1179 0 0 199 199 0 1161 1 292 1 6 1 0 0 292 11 292 3 N.C. N.C. 292 20
Ouest du Québec 330 0 1 83 84 0 330 0 16 0 0 0 0 0 16 1 16 2 N.C. N.C. 16 0
Montérégie 307 0 0 18 18 0 120 0 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 4691 10 3 948 961 1 3738 10 630 1 6 1 0 0 852 24 857 15 N.C. N.C. 723 38
P.H.O.L. - Ottawa 75 0 14 0 14 0 75 0 75 0 0 0 0 0 75 0 75 0 75 8 75 3
EORLA 206 0 0 20 20 0 206 3 39 0 0 0 1 0 39 0 39 0 39 1 39 1
P.H.O.L. - Kingston 36 0 0 0 0 0 36 2 36 0 0 0 0 1 36 0 36 0 36 4 36 1
UHN / Mount Sinai Hospital 509 0 0 1 1 0 509 3 13 0 0 0 0 0 13 0 13 0 13 1 13 1
P.H.O.L. - Toronto 304 0 8 0 8 0 304 1 304 0 0 0 0 4 304 4 304 3 304 24 304 16
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.
Sunnybrook & Women's College HSC 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. - Sault Ste. Marie 8 0 0 0 0 0 8 3 8 0 0 0 0 0 8 0 8 0 8 0 8 1
P.H.O.L. - Timmins 22 0 2 0 2 0 22 0 22 0 0 0 0 0 22 0 22 0 22 0 22 0
St. Joseph's - London 79 0 0 2 2 0 79 4 79 0 0 0 0 0 79 2 79 8 79 11 6 0
P.H.O.L. - London 104 0 9 4 13 0 104 1 104 0 0 0 0 3 104 0 104 6 104 8 104 9
P.H.O.L. - Orillia 20 0 0 0 0 0 20 5 20 0 0 0 0 1 20 0 20 0 20 3 20 0
P.H.O.L. - Thunder Bay 11 0 0 0 0 0 11 1 11 0 0 0 0 3 11 0 11 0 11 2 11 2
P.H.O.L. - Sudbury 9 0 0 0 0 0 9 0 9 0 0 0 0 0 9 0 9 0 9 0 9 0
P.H.O.L. - Hamilton 66 0 2 1 3 0 66 0 66 0 0 0 0 0 66 0 66 1 66 6 66 6
P.H.O.L. - Peterborough 7 0 0 0 0 0 7 0 7 0 0 0 0 1 7 0 7 0 7 1 7 2
St. Joseph's - Hamilton 703 0 0 24 24 0 703 8 703 0 0 1 0 0 703 6 703 10 703 43 0 0
Province of Ontario 2159 0 35 52 87 0 2159 31 1496 0 0 1 1 13 1496 12 1496 28 1496 112 720 42
Province of Manitoba 1249 0 2 79 81 0 1249 55 121 0 1 0 3 0 121 2 175 1 121 11 175 1
Province of Saskatchewan 749 0 5 92 97 0 749 153 215 1 2 1 5 0 216 1 216 4 216 19 215 14
Province of Alberta 2592 0 55 172 227 0 1021 90 1021 1 5 4 5 0 1021 13 1021 38 1021 73 1021 23
Prairies 4590 0 62 343 405 0 3019 298 1357 2 8 5 13 0 1358 16 1412 43 1358 103 1411 38
British Columbia 4410 0 35 1 114 0 4206 62 658 0 3 2 6 2 658 14 658 15 646 55 646 54
Yukon 60 0 0 0 0 0 60 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 95 0 22 0 22 0 93 9 3 0 0 0 0 0 3 0 3 0 93 10 3 0
Nunavut 65 0 20 0 20 0 64 3 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 220 0 42 0 42 0 217 13 4 0 0 0 0 0 4 1 4 0 94 11 4 0
Canada 17061 10 181 1368 1637 2 14249 426 4247 3 17 11 22 15 4470 69 4529 119 3696 297 3606 177

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.

The reporting laboratory previously listed as CHEO - Ottawa is now listed as EORLA to better reflect data submitted by this provider.

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: BC Children's and Women's Hospital, Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Powell River Hospital, St. Paul's Hospital, Vancouver General Hospital, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites and Northern Health Authority sites.

Delays in the reporting of data may cause data to change retrospectively.

For British Columbia, only data from subtyped influenza A specimens are included in the weekly number of influenza detections. The sum of A(H1N1)pdm09, A(H3), and A(UnS) positive results may not equal the sum of total Flu A positive results.

Table 2: Cumulative respiratory virus detections from August 29, 2021 to April 30, 2022 (surveillance weeks 2021-35 to 2022-17)
Reporting Laboratory 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 8547 0 0 1 1 0 8546 102 8549 1 7 116 0 154 8556 30 8543 33 8550 1757 N.C. N.C.
Prince Edward Island 2187 0 4 4 8 0 2187 233 2142 0 0 156 0 0 2187 59 2187 43 2187 521 2187 118
Nova Scotia 17970 0 2 79 81 6 17975 317 1489 0 2 39 14 0 1503 13 1503 7 1503 117 1503 38
New Brunswick 15014 0 1 14 15 0 9534 275 2910 0 0 23 5 0 2903 18 2910 10 2910 54 2819 7
Atlantic 43718 0 7 98 105 6 38242 927 15090 1 9 334 19 154 15149 120 15143 93 15150 2449 6509 163
Région Nord-Est 20308 15 0 567 582 3 8972 1443 795 0 0 9 1 0 894 17 403 11 N.C. N.C. 1239 23
Québec-Chaudière-Appalaches 6334 0 0 371 371 4 6932 999 1499 0 10 7 10 0 1996 85 1905 77 N.C. N.C. 1593 64
Centre-du-Québec 7211 0 2 295 297 5 7147 1082 893 0 3 22 1 0 893 33 901 21 N.C. N.C. 886 16
Montréal-Laval 21124 0 3 507 510 6 21058 2451 7140 8 33 28 5 0 7139 415 7137 343 N.C. N.C. 7136 136
Ouest du Québec 5431 0 5 197 202 0 5373 930 127 0 3 3 4 0 120 8 116 3 N.C. N.C. 116 3
Montérégie 3318 0 0 55 55 0 3060 387 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 63726 15 10 1992 2017 18 52542 7292 10454 8 49 69 21 0 11042 558 10462 455 N.C. N.C. 10970 242
P.H.O.L. - Ottawa 6703 2 25 0 27 0 6703 1439 6703 0 0 0 0 733 6703 311 6701 40 6703 2235 6701 273
EORLA 6129 0 0 36 36 0 6104 611 892 0 2 19 2 0 892 15 573 4 892 149 550 20
P.H.O.L. - Kingston 1330 0 4 0 4 0 1336 127 1335 0 0 0 0 130 1335 19 1321 2 1335 302 1321 89
UHN / Mount Sinai Hospital 16370 0 0 25 25 3 16370 102 517 0 0 0 0 0 517 0 517 1 517 14 517 6
P.H.O.L. - Toronto 8650 2 21 1 24 0 8638 276 8638 0 0 0 0 289 8641 120 8635 25 8638 1009 8636 283
Sick Kids Hospital - Toronto 839 0 0 0 0 0 0 0 839 0 2 68 1 0 839 12 839 1 839 233 839 10
Sunnybrook & Women's College HSC 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
P.H.O.L. - Sault Ste. Marie 308 0 2 1 3 0 307 8 307 0 0 0 0 7 307 3 307 1 307 50 307 19
P.H.O.L. - Timmins 407 0 2 0 2 0 407 25 407 0 0 0 0 18 407 1 407 0 407 31 407 26
St. Joseph's - London 12532 0 0 42 42 0 12535 770 10978 0 0 7 0 87 10978 137 10978 39 10932 569 525 2
P.H.O.L. - London 3296 0 17 5 22 0 3295 453 3295 0 0 0 0 162 3295 75 3294 20 3295 452 3294 258
P.H.O.L. - Orillia 821 0 1 0 1 0 821 116 821 0 0 0 0 44 821 26 818 7 821 208 818 59
P.H.O.L. - Thunder Bay 297 0 1 0 1 0 297 19 297 0 0 0 0 24 297 1 297 0 297 57 297 37
P.H.O.L. - Sudbury 312 0 2 0 2 0 312 11 312 0 0 0 0 9 312 1 312 2 312 31 312 9
P.H.O.L. - Hamilton 1629 0 7 1 8 0 1624 68 1624 0 0 0 0 45 1625 13 1624 13 1624 220 1624 98
P.H.O.L. - Peterborough 580 0 0 0 0 0 580 45 573 0 0 0 0 12 573 1 571 1 573 91 571 45
St. Joseph's - Hamilton 20891 0 4 64 68 1 20885 1633 20885 2 0 652 0 0 20885 202 20885 64 20885 1882 0 0
Province of Ontario 81094 4 86 175 265 4 80214 5703 58423 2 4 746 3 1560 58427 937 58079 220 58377 7533 26719 1234
Manitoba 51033 1 45 138 184 0 51033 1154 2445 2 9 74 6 0 2445 39 3745 9 2445 281 3551 78
Province of Saskatchewan 25098 2 125 208 335 0 25067 1357 4423 1 4 197 47 0 4423 77 4423 22 4423 611 4419 252
Province of Alberta 71768 1 209 527 737 2 28848 3095 28848 2 51 671 187 0 28848 299 28848 198 28848 3360 28848 1417
Prairies 147899 4 379 873 1256 2 104948 5606 35716 5 64 942 240 0 35716 415 37016 229 35716 4252 36818 1747
British Columbia 174877 5 214 6 496 87 170959 8962 21319 6 12 1062 214 159 21319 412 21315 119 20871 3307 20919 716
Yukon 5342 1 2 2 7 7 5352 301 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 1197 0 55 1 56 0 1135 116 92 0 1 1 0 0 92 2 92 0 1134 131 92 1
Nunavut 15260 0 48 0 48 0 15244 23 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 21799 1 105 3 111 7 21731 440 119 0 1 2 0 0 119 4 119 0 1161 141 116 1
Canada 533113 29 801 3147 4250 124 468636 28930 141121 22 139 3155 497 1873 141772 2446 142134 1116 131275 17682 102051 4103

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.

The reporting laboratory previously listed as CHEO - Ottawa is now listed as EORLA to better reflect data submitted by this provider.

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: BC Children's and Women's Hospital, Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Powell River Hospital, St. Paul's Hospital, Vancouver General Hospital, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites and Northern Health Authority sites.

Delays in the reporting of data may cause data to change retrospectively.

For British Columbia, only data from subtyped influenza A specimens are included in the weekly number of influenza detections. The sum of A(H1N1)pdm09, A(H3), and A(UnS) positive results may not equal the sum of total Flu A positive results.

Positive respiratory virus tests historical comparison

Figure 1: Positive respiratory 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: 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

a Human coronavirus excludes human coronaviruses SARS-CoV, MERS-CoV and SARS-CoV-2; Includes seasonal human coronaviruses HCoV-229E, HCoV-OC43, HCoV-NL63, HCoV-HKU1.

Figure 1: Positive respiratory 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 2021-2022 A% 2020-2021 A% Max A% Base Min A% Base Av A% Base 2021-2022 B% 2020-2021 B% Max B% Base Min B% Base Av B% Base 2021-2022 RSV% 2020-2021 RSV% Max RSV% Base Min RSV% Base Av RSV% Base 2021-2022 HPIV% 2020-2021 HPIV% Max HPIV% Base Min HPIV% Base Av HPIV% Base 2021-2022 ADV% 2020-2021 ADV% Max ADV% Base Min ADV% Base Av ADV% Base 2021-2022 HMPV% 2020-2021 HMPV% Max HMPV% Base Min HMPV% Base Av HMPV% Base 2021-2022 EV/RV% 2020-2021 EV/RV% Max EV/RV% Base Min EV/RV% Base Av EV/RV% Base 2021-2022 HCoV% 2020-2021 HCoV% Max HCoV% Base Min HCoV% Base Av HCoV% Base
35 2021-09-04 0.04 0.00 1.60 0.11 0.68 0.00 0.02 0.28 0.00 0.13 4.79 0.02 1.34 0.38 0.60 5.99 0.08 3.16 1.15 2.42 1.18 0.27 1.74 0.99 1.43 0.23 0.17 2.04 0.10 0.77 21.97 9.07 27.19 22.44 24.78 1.05 0.06 0.76 0.18 0.45
36 2021-09-11 0.01 0.00 2.11 0.23 0.98 0.00 0.00 0.55 0.00 0.15 7.18 0.04 1.09 0.22 0.57 4.92 0.20 3.31 1.35 2.32 1.15 0.40 2.85 1.42 1.87 0.24 0.06 0.84 0.10 0.48 18.62 8.13 30.69 23.30 26.31 0.62 0.00 0.38 0.12 0.22
37 2021-09-18 0.03 0.00 1.59 0.36 0.87 0.00 0.00 0.19 0.04 0.12 8.09 0.02 1.37 0.31 0.64 5.97 0.13 3.26 1.65 2.40 0.81 0.35 2.44 1.38 1.86 0.17 0.05 1.61 0.00 0.51 27.46 8.07 33.58 27.74 31.68 0.44 0.05 0.56 0.00 0.26
38 2021-09-25 0.00 0.02 2.15 0.43 1.16 0.00 0.00 0.21 0.00 0.14 7.63 0.10 1.24 0.37 0.64 4.73 0.07 2.87 1.92 2.33 0.82 0.58 2.04 1.11 1.63 0.37 0.02 1.43 0.06 0.47 33.16 15.67 39.57 32.80 35.33 0.67 0.00 1.36 0.06 0.43
39 2021-10-02 0.01 0.00 2.65 0.57 1.53 0.00 0.00 0.29 0.09 0.18 9.01 0.05 1.29 0.41 0.68 8.12 0.02 3.01 1.70 2.24 1.14 0.19 2.27 1.04 1.66 0.17 0.04 0.72 0.05 0.28 30.02 24.12 40.59 34.87 37.68 0.62 0.05 0.66 0.07 0.45
40 2021-10-09 0.00 0.00 2.17 1.01 1.58 0.02 0.00 0.20 0.05 0.11 8.98 0.07 1.39 0.34 0.67 8.19 0.02 3.28 1.90 2.43 1.31 0.44 2.25 1.39 1.82 0.16 0.00 0.92 0.05 0.34 26.24 16.62 41.29 33.00 35.43 0.57 0.09 1.08 0.22 0.58
41 2021-10-16 0.03 0.01 2.66 1.05 1.57 0.03 0.00 0.36 0.03 0.16 10.07 0.10 1.74 0.58 0.98 10.46 0.06 3.70 1.94 2.74 1.37 0.37 1.91 1.28 1.70 0.20 0.19 0.95 0.04 0.46 22.91 15.48 33.62 26.94 29.81 1.69 0.02 0.70 0.00 0.33
42 2021-10-23 0.03 0.00 2.96 0.77 1.92 0.02 0.00 0.45 0.05 0.25 8.65 0.07 2.11 0.63 1.14 10.01 0.06 3.89 2.64 3.20 2.54 0.47 2.38 1.47 1.86 0.15 0.06 0.89 0.15 0.38 22.17 13.60 32.62 24.54 27.82 1.07 0.00 1.18 0.20 0.49
43 2021-10-30 0.03 0.01 5.23 0.68 2.60 0.02 0.00 0.55 0.06 0.23 8.55 0.07 2.16 0.55 1.32 9.38 0.07 3.98 3.18 3.56 1.15 0.37 2.42 1.63 1.96 0.36 0.02 1.64 0.12 0.57 19.64 13.14 28.73 21.67 24.95 1.05 0.00 2.35 0.27 0.75
44 2021-11-06 0.10 0.04 8.42 1.08 3.39 0.10 0.03 0.71 0.12 0.31 8.19 0.05 3.35 0.83 1.92 10.27 0.03 4.81 2.94 3.70 1.42 0.22 2.88 1.18 2.20 0.77 0.13 1.08 0.23 0.47 21.44 9.23 23.82 16.75 21.34 2.21 0.00 2.59 0.21 0.88
45 2021-11-13 0.07 0.02 9.83 1.18 4.19 0.06 0.02 0.97 0.22 0.44 7.33 0.04 4.43 1.29 2.59 9.97 0.01 5.42 2.53 4.01 1.61 0.33 2.68 2.02 2.42 0.64 0.01 1.30 0.04 0.77 22.40 9.70 23.08 15.17 20.56 2.54 0.03 2.74 0.52 0.96
46 2021-11-20 0.10 0.03 13.95 1.42 5.47 0.05 0.01 1.49 0.09 0.58 7.49 0.06 6.33 1.38 3.29 8.29 0.04 5.72 1.62 4.19 2.51 0.30 2.90 1.99 2.53 0.99 0.04 1.43 0.18 0.79 21.37 9.02 22.77 15.28 19.27 3.05 0.03 3.32 0.46 1.25
47 2021-11-27 0.12 0.03 15.24 1.25 6.91 0.07 0.04 2.13 0.13 0.80 8.48 0.03 8.69 1.79 4.46 7.04 0.06 7.00 2.36 4.72 1.94 0.32 2.95 1.83 2.35 1.01 0.02 2.02 0.09 0.89 18.53 8.44 20.84 12.15 16.09 3.93 0.04 3.26 0.37 1.25
48 2021-12-04 0.19 0.04 18.07 0.76 9.40 0.15 0.01 3.18 0.08 1.20 9.34 0.02 9.47 3.11 5.72 5.77 0.02 6.14 3.03 4.18 1.89 0.35 3.34 1.66 2.48 1.48 0.02 1.94 0.31 1.08 16.61 7.94 16.72 12.69 13.83 4.96 0.02 4.30 1.00 2.04
49 2021-12-11 0.23 0.03 19.52 1.43 11.41 0.05 0.01 4.21 0.19 1.60 10.51 0.06 12.26 4.87 7.12 3.97 0.00 5.65 2.94 4.19 2.48 0.54 3.03 1.84 2.49 1.22 0.05 2.80 0.49 1.46 14.56 6.21 16.32 10.72 13.07 6.58 0.05 5.19 0.84 2.52
50 2021-12-18 0.23 0.01 26.42 1.97 14.27 0.02 0.01 7.95 0.15 2.55 11.21 0.07 13.19 5.39 7.93 3.23 0.06 5.95 2.54 4.27 2.72 0.51 3.27 1.49 2.45 1.08 0.02 3.32 0.46 1.70 12.39 6.62 13.85 8.43 10.90 7.29 0.11 6.04 1.54 3.16
51 2021-12-25 0.18 0.00 28.53 2.27 16.81 0.02 0.01 10.44 0.19 3.30 9.26 0.07 15.23 6.52 9.27 3.01 0.04 6.71 2.94 3.95 2.54 0.58 3.20 1.36 2.04 1.20 0.04 4.39 0.37 2.44 9.95 5.65 14.18 8.81 10.48 8.18 0.05 6.68 1.87 3.72
52 2022-01-01 0.09 0.00 33.97 3.30 20.41 0.01 0.00 12.73 0.23 4.07 6.96 0.01 17.80 6.83 10.39 2.13 0.03 5.08 2.87 3.75 1.92 0.48 2.59 1.20 1.76 1.00 0.11 3.81 0.41 2.44 7.70 6.53 14.41 6.24 9.23 10.36 0.07 6.73 2.78 4.75
1 2022-01-08 0.08 0.00 30.93 4.58 19.55 0.00 0.00 10.34 0.22 3.86 5.47 0.04 15.62 7.12 10.17 1.84 0.12 5.08 2.68 3.34 1.84 0.81 2.67 0.85 1.54 0.72 0.06 4.45 0.28 2.70 5.71 5.43 11.09 4.36 7.42 9.27 0.12 7.77 3.07 5.16
2 2022-01-15 0.11 0.00 26.80 5.46 19.10 0.01 0.00 11.01 0.29 3.91 4.49 0.07 14.05 6.60 9.63 1.19 0.08 4.12 2.46 3.05 1.13 0.82 2.15 0.87 1.37 0.38 0.03 4.76 0.42 2.66 3.98 5.18 9.55 4.31 6.79 7.49 0.16 7.89 2.84 5.44
3 2022-01-22 0.04 0.01 28.20 9.13 18.94 0.01 0.01 12.75 0.35 4.69 3.55 0.03 15.56 6.72 10.32 0.76 0.05 3.25 2.59 2.82 1.34 0.40 2.10 1.15 1.45 0.24 0.11 5.56 0.47 3.13 3.11 3.56 8.42 4.44 6.01 4.97 0.26 7.90 4.17 6.11
4 2022-01-29 0.05 0.00 27.01 12.34 18.81 0.00 0.00 12.74 0.41 5.15 2.43 0.05 15.88 7.02 11.23 0.64 0.06 3.12 1.77 2.55 1.18 0.46 1.83 1.11 1.49 0.23 0.12 5.19 0.55 3.01 2.59 3.87 9.04 4.89 6.41 3.92 0.16 7.86 3.79 6.08
5 2022-02-05 0.03 0.00 23.66 15.78 19.14 0.01 0.00 14.84 0.41 5.76 2.28 0.04 16.33 7.17 11.49 0.48 0.06 3.48 1.70 2.39 1.57 0.29 1.93 1.36 1.62 0.25 0.16 5.70 0.58 3.29 3.02 4.76 9.79 6.06 6.94 2.83 0.13 8.49 4.55 6.84
6 2022-02-12 0.04 0.02 23.36 15.63 18.79 0.01 0.00 16.23 0.44 6.21 2.18 0.08 15.79 6.52 11.70 0.51 0.10 2.89 1.57 2.19 1.44 0.54 1.74 1.25 1.51 0.42 0.19 5.57 0.65 3.39 3.86 5.08 9.89 6.16 6.98 3.01 0.20 8.57 3.48 6.75
7 2022-02-19 0.02 0.00 24.22 15.48 18.52 0.00 0.00 17.02 0.35 6.54 2.24 0.02 15.53 6.95 11.26 0.44 0.00 3.20 1.42 2.12 1.52 0.49 1.61 1.30 1.51 0.44 0.14 6.05 1.45 3.94 4.44 5.56 8.95 6.00 7.02 3.24 0.13 8.02 4.35 6.54
8 2022-02-26 0.06 0.00 28.62 12.42 18.53 0.02 0.00 16.79 0.45 6.60 2.20 0.05 15.47 6.64 10.63 0.73 0.16 3.21 1.31 2.25 1.85 0.72 2.00 1.38 1.67 0.53 0.04 5.74 1.19 4.08 6.30 4.77 8.35 5.20 6.94 3.67 0.14 8.29 4.21 6.60
9 2022-03-05 0.12 0.00 29.30 11.04 18.35 0.00 0.00 15.45 0.74 6.24 2.62 0.01 15.62 6.54 10.04 0.60 0.07 3.35 1.41 2.44 1.90 0.86 1.92 1.09 1.40 0.40 0.11 6.42 1.87 4.38 7.76 5.48 9.04 5.73 7.75 3.32 0.36 8.01 5.09 6.86
10 2022-03-12 0.16 0.00 29.65 8.51 16.81 0.00 0.00 14.86 0.81 6.41 3.27 0.00 14.97 6.35 9.37 0.68 0.06 4.18 1.19 2.69 1.98 0.38 2.23 1.50 1.78 0.51 0.00 6.74 2.26 4.80 8.20 4.62 10.16 5.55 8.08 3.86 0.34 8.34 4.28 7.01
11 2022-03-19 0.27 0.01 24.27 6.74 14.55 0.01 0.00 13.11 1.05 6.86 3.91 0.03 12.11 6.29 8.83 0.66 0.19 4.58 1.35 3.00 1.88 0.63 2.32 1.23 1.69 0.59 0.11 7.94 2.52 4.71 8.93 4.08 9.45 7.15 8.24 3.25 0.33 8.02 4.35 6.23
12 2022-03-26 0.86 0.00 20.91 5.51 12.67 0.00 0.00 11.53 1.51 7.43 4.04 0.07 10.70 6.46 8.12 1.05 0.00 4.95 1.26 3.34 1.71 0.35 2.13 1.84 1.97 0.77 0.14 6.69 3.65 5.19 9.47 4.61 10.26 8.71 9.66 4.38 0.54 6.99 3.95 5.69
13 2022-04-02 1.52 0.00 18.09 4.67 11.66 0.00 0.00 12.55 1.98 7.90 4.27 0.04 9.32 6.45 7.64 1.39 0.18 5.21 1.48 3.68 2.29 0.35 2.12 1.37 1.70 1.28 0.07 6.90 3.95 5.18 8.44 4.86 12.58 7.69 10.26 4.45 0.30 8.16 3.65 5.46
14 2022-04-09 2.46 0.00 17.83 3.21 9.98 0.01 0.00 13.12 2.12 7.88 4.40 0.08 8.09 5.32 6.44 1.18 0.00 6.26 1.67 4.31 1.74 0.34 2.31 1.50 1.86 1.45 0.04 7.70 4.14 6.00 9.21 5.49 13.59 8.60 12.03 4.24 0.41 7.79 3.84 4.87
15 2022-04-16 3.82 0.01 17.75 2.18 8.72 0.02 0.00 12.22 2.00 7.55 3.74 0.11 7.73 4.64 5.97 1.35 0.12 6.94 1.97 4.61 1.71 0.98 2.62 1.64 2.12 1.52 0.04 7.47 3.81 5.94 9.10 8.23 14.59 9.44 13.16 5.00 1.07 5.52 3.23 4.24
16 2022-04-23 6.95 0.00 13.67 2.13 6.80 0.01 0.00 11.94 2.56 7.68 3.20 0.23 6.64 4.40 5.40 2.20 0.16 7.88 1.97 5.20 1.84 0.82 3.21 1.85 2.32 2.18 0.04 7.16 3.71 5.90 8.13 6.18 16.10 10.84 13.78 4.91 0.69 4.99 3.51 4.32
17 2022-04-30 9.59 0.00 11.31 1.28 5.34 0.01 0.00 12.18 2.94 7.49 2.99 0.21 5.79 3.52 4.58 1.60 0.61 8.67 2.07 6.01 1.54 0.35 2.54 1.70 2.10 2.63 0.04 6.58 4.68 5.64 8.04 7.23 18.29 13.64 16.16 4.91 0.96 4.11 2.54 3.37

Number of positive respiratory virus tests

Figure 2: Number of positive respiratory virus tests reported by participating laboratories in Canada by surveillance week
Figure 2
Figure 2: Number of positive respiratory virus tests reported by participating laboratories in Canada by surveillance week
Week ParaInfluenza Adenovirus Human metapneumovirus Enterovirus/Rhinovirus Coronavirus Respiratory syncytial virus Influenza
35 158 31 6 557 21 286 3
36 142 33 7 511 14 479 1
37 207 28 6 916 11 628 3
38 179 31 14 1,180 17 649 0
39 329 46 7 1,147 17 771 1
40 313 50 6 920 17 867 2
41 374 49 7 743 48 932 6
42 402 102 6 788 36 941 6
43 391 48 15 729 35 1,033 7
44 405 56 30 777 67 1,134 32
45 447 72 29 932 88 1,144 23
46 366 111 44 869 106 1,076 26
47 337 91 48 795 153 1,236 33
48 275 91 72 736 188 1,526 64
49 219 139 69 758 252 1,849 55
50 189 163 64 684 278 2,268 56
51 165 139 66 508 256 2,414 58
52 109 99 52 374 332 1,906 29
1 93 95 37 280 312 1,378 25
2 62 54 18 178 252 925 28
3 34 60 11 133 154 624 9
4 28 53 10 109 126 355 8
5 19 62 10 115 78 325 6
6 18 51 15 128 70 275 6
7 14 48 14 134 66 266 2
8 22 56 16 179 72 241 9
9 19 61 13 233 71 264 14
10 21 62 16 240 83 305 17
11 20 57 18 252 67 346 29
12 34 56 26 289 104 367 93
13 48 80 45 274 110 420 179
14 43 64 54 310 116 446 313
15 52 67 60 315 154 414 511
16 84 72 86 292 155 414 1,080
17 68 69 119 297 177 426 1,639

Positive influenza (Flu) tests

Figure 3: Positive influenza (Flu) tests (%) in Canada by region by surveillance week
Figure 3
Figure 3: 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 2021-09-04 7140 0.04 0.00 625 0.00 0.00 848 0.12 0.00 1305 0.00 0.00 2849 0.04 0.00 1025 0.10 0.00 488 0.00 0.00
36 2021-09-11 8012 0.01 0.00 675 0.00 0.00 1369 0.00 0.00 1224 0.08 0.00 3302 0.00 0.00 930 0.00 0.00 512 0.00 0.00
37 2021-09-18 9316 0.03 0.00 1009 0.00 0.00 1718 0.00 0.00 1543 0.06 0.00 3450 0.06 0.00 985 0.00 0.00 611 0.00 0.00
38 2021-09-25 9821 0.00 0.00 1141 0.00 0.00 1502 0.00 0.00 1647 0.00 0.00 3632 0.00 0.00 1192 0.00 0.00 707 0.00 0.00
39 2021-10-02 9691 0.01 0.00 1052 0.00 0.00 1089 0.00 0.00 1954 0.00 0.00 3498 0.03 0.00 1611 0.00 0.00 487 0.00 0.00
40 2021-10-09 10776 0.00 0.02 799 0.00 0.00 1641 0.00 0.12 2059 0.00 0.00 3870 0.00 0.00 1823 0.00 0.00 584 0.00 0.00
41 2021-10-16 10372 0.03 0.03 614 0.00 0.00 1704 0.00 0.18 1950 0.05 0.00 3622 0.03 0.00 1904 0.05 0.00 578 0.00 0.00
42 2021-10-23 12508 0.03 0.02 634 0.00 0.00 2050 0.00 0.00 2269 0.04 0.00 4560 0.00 0.00 2440 0.08 0.04 555 0.18 0.18
43 2021-10-30 13341 0.03 0.02 1086 0.00 0.00 2119 0.05 0.00 2143 0.00 0.00 4645 0.04 0.00 2920 0.00 0.07 428 0.23 0.23
44 2021-11-06 15442 0.10 0.10 577 0.00 0.00 2323 0.00 0.00 2473 0.04 0.00 5012 0.00 0.00 4625 0.30 0.28 432 0.23 0.69
45 2021-11-13 17546 0.07 0.06 1195 0.00 0.00 2441 0.04 0.00 2835 0.04 0.00 5278 0.08 0.00 5054 0.14 0.18 743 0.00 0.13
46 2021-11-20 16418 0.10 0.05 1826 0.00 0.00 2261 0.00 0.04 2619 0.19 0.00 4930 0.04 0.00 4339 0.21 0.18 443 0.23 0.00
47 2021-11-27 16917 0.12 0.07 2042 0.05 0.05 2584 0.12 0.04 2979 0.10 0.00 4842 0.00 0.00 4200 0.33 0.24 270 0.00 0.00
48 2021-12-04 18531 0.19 0.15 3195 0.13 0.09 2471 0.08 0.04 3068 0.16 0.00 4731 0.06 0.00 4846 0.45 0.50 220 0.00 0.00
49 2021-12-11 19974 0.23 0.05 3417 0.09 0.00 2880 0.31 0.14 3420 0.23 0.00 4778 0.25 0.00 5172 0.27 0.10 307 0.00 0.00
50 2021-12-18 22543 0.23 0.02 1860 0.27 0.00 2759 0.14 0.00 3883 0.21 0.00 4878 0.10 0.02 8638 0.35 0.03 525 0.00 0.00
51 2021-12-25 28471 0.18 0.02 1238 0.00 0.00 3049 0.59 0.07 4030 0.07 0.00 5324 0.15 0.00 14257 0.16 0.02 573 0.00 0.17
52 2022-01-01 29555 0.09 0.01 1378 0.29 0.00 2560 0.00 0.00 3665 0.14 0.00 6284 0.13 0.02 13696 0.07 0.01 1972 0.00 0.00
1 2022-01-08 28418 0.08 0.00 967 0.00 0.00 2249 0.18 0.00 3668 0.03 0.00 7731 0.17 0.00 11791 0.05 0.01 2012 0.00 0.00
2 2022-01-15 23659 0.11 0.01 1045 0.19 0.00 1400 0.21 0.00 2903 0.03 0.00 6816 0.16 0.00 9996 0.08 0.03 1499 0.00 0.00
3 2022-01-22 19585 0.04 0.01 1195 0.00 0.00 1223 0.16 0.00 2591 0.00 0.08 5637 0.07 0.00 8275 0.01 0.00 664 0.00 0.00
4 2022-01-29 16496 0.05 0.00 1099 0.00 0.00 1136 0.26 0.00 2367 0.00 0.00 4650 0.06 0.00 6638 0.03 0.00 606 0.00 0.00
5 2022-02-05 15977 0.03 0.01 1058 0.00 0.00 844 0.12 0.00 2126 0.00 0.05 4004 0.10 0.00 6671 0.00 0.00 1274 0.00 0.00
6 2022-02-12 13873 0.04 0.01 1069 0.00 0.00 985 0.10 0.00 1981 0.00 0.00 3025 0.03 0.00 5917 0.05 0.02 896 0.00 0.00
7 2022-02-19 13127 0.02 0.00 1094 0.00 0.00 832 0.00 0.00 1941 0.05 0.00 2745 0.04 0.00 5451 0.00 0.00 1064 0.00 0.00
8 2022-02-26 12180 0.06 0.02 1177 0.00 0.00 875 0.34 0.11 1736 0.17 0.00 2457 0.04 0.00 5256 0.00 0.02 679 0.00 0.00
9 2022-03-05 11282 0.12 0.00 1090 0.00 0.00 911 0.00 0.00 1843 0.11 0.00 2649 0.38 0.00 4242 0.05 0.00 547 0.00 0.00
10 2022-03-12 10752 0.16 0.00 1108 0.00 0.00 1040 0.29 0.00 1763 0.06 0.00 2604 0.35 0.00 3713 0.11 0.00 524 0.00 0.00
11 2022-03-19 10207 0.27 0.01 1097 0.00 0.00 902 0.44 0.00 1652 0.24 0.00 2620 0.61 0.00 3617 0.11 0.03 319 0.00 0.00
12 2022-03-26 10808 0.86 0.00 1247 0.08 0.00 1186 0.93 0.00 1766 0.28 0.00 2739 1.90 0.00 3491 0.66 0.00 379 0.26 0.00
13 2022-04-02 11801 1.52 0.00 1324 0.30 0.00 1484 3.44 0.00 1894 1.11 0.00 3260 2.42 0.00 3668 0.63 0.00 171 0.58 0.00
14 2022-04-09 12696 2.46 0.01 1272 0.63 0.08 1644 6.93 0.00 1874 1.17 0.00 4124 3.13 0.00 3620 0.91 0.00 162 3.70 0.00
15 2022-04-16 13311 3.82 0.02 1093 1.65 0.00 1896 11.45 0.05 1905 2.10 0.05 4161 4.16 0.00 4116 1.09 0.00 140 11.43 0.00
16 2022-04-23 15504 6.95 0.01 1429 1.89 0.00 3060 19.61 0.03 1859 1.83 0.00 4600 6.43 0.00 4348 1.86 0.02 208 19.23 0.00
17 2022-04-30 17061 9.59 0.01 991 2.83 0.10 4691 20.49 0.02 2159 4.03 0.00 4590 8.82 0.00 4410 2.59 0.00 220 19.09 0.00

Positive respiratory syncytial virus (RSV) tests

Figure 4: Positive respiratory syncytial virus (RSV) tests (%) in Canada by region by surveillance week
Figure 4
Figure 4: 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 2021-09-04 5970 4.79 613 0.00 693 37.95 1277 1.49 1875 0.05 1025 0.29 487 0.00
36 2021-09-11 6672 7.18 671 0.60 1069 39.85 1187 3.12 2234 0.22 930 0.54 581 0.34
37 2021-09-18 7761 8.09 997 0.40 1310 40.76 1499 5.07 2361 0.30 985 0.71 609 0.00
38 2021-09-25 8511 7.63 1135 0.00 1356 41.67 1612 3.97 2510 0.32 1192 1.01 706 0.00
39 2021-10-02 8560 9.01 1052 0.10 1104 53.53 1913 7.42 2394 0.54 1611 1.49 486 0.00
40 2021-10-09 9659 8.98 792 0.38 1583 39.36 2015 9.43 2864 0.77 1823 1.59 582 0.00
41 2021-10-16 9259 10.07 608 0.16 1676 42.78 1867 8.36 2627 0.72 1904 2.00 577 0.17
42 2021-10-23 10882 8.65 581 0.17 1845 33.88 2199 9.55 3264 1.01 2440 2.95 553 0.00
43 2021-10-30 12078 8.55 965 0.10 2121 31.02 2105 9.88 3540 1.05 2920 4.35 427 0.47
44 2021-11-06 13841 8.19 564 1.24 2048 26.46 2421 10.45 3768 1.70 4612 5.77 428 0.47
45 2021-11-13 15615 7.33 837 0.84 2239 18.49 2767 9.97 4011 1.75 5024 7.48 737 0.14
46 2021-11-20 14367 7.49 1259 2.54 2064 12.74 2556 13.38 3734 2.25 4312 8.23 442 0.00
47 2021-11-27 14584 8.48 1607 2.68 2132 11.16 2907 13.62 3510 3.87 4160 10.17 268 0.00
48 2021-12-04 16345 9.34 2884 2.67 2164 8.27 3002 14.69 3272 4.68 4806 13.82 217 5.53
49 2021-12-11 17600 10.51 2979 3.63 2519 6.95 3354 19.11 3309 6.20 5134 13.63 305 6.56
50 2021-12-18 20239 11.21 1442 8.18 2354 5.61 3813 15.53 3495 7.44 8611 13.10 524 7.25
51 2021-12-25 26063 9.26 947 6.65 2467 4.82 4029 13.73 3796 9.69 14257 8.86 567 8.47
52 2022-01-01 27388 6.96 1378 4.43 1916 3.60 3664 10.15 4576 9.55 13884 6.64 1970 2.28
1 2022-01-08 25176 5.47 983 6.61 1708 2.93 3668 5.97 5382 6.06 11428 5.90 2007 2.19
2 2022-01-15 20583 4.49 824 6.67 1142 2.10 2903 4.79 4911 4.79 9306 4.82 1497 1.54
3 2022-01-22 17595 3.55 1187 3.54 947 1.37 2591 3.24 4354 3.79 7814 3.90 702 2.14
4 2022-01-29 14630 2.43 935 3.32 827 1.21 2367 1.61 3542 3.87 6356 2.03 603 1.66
5 2022-02-05 14285 2.28 859 1.51 667 1.05 2124 1.65 3006 3.76 6395 2.17 1234 1.46
6 2022-02-12 12590 2.18 998 1.70 749 1.47 1980 0.91 2187 5.49 5784 1.64 892 1.57
7 2022-02-19 11858 2.24 997 1.60 539 0.74 1940 0.98 2008 6.57 5366 1.60 1008 0.89
8 2022-02-26 10935 2.20 1018 1.57 581 0.34 1735 1.21 1718 6.34 5206 1.67 677 0.89
9 2022-03-05 10076 2.62 982 1.83 734 0.95 1843 1.03 1857 7.32 4115 1.92 545 0.92
10 2022-03-12 9339 3.27 914 1.86 720 0.42 1763 1.08 1811 10.38 3609 1.94 522 1.53
11 2022-03-19 8851 3.91 894 2.80 708 0.85 1652 1.27 1799 11.56 3479 2.07 319 4.39
12 2022-03-26 9093 4.04 1027 1.27 828 0.36 1765 0.96 1754 14.60 3343 1.76 376 5.05
13 2022-04-02 9834 4.27 1114 0.81 1012 0.10 1894 0.63 2199 14.05 3448 1.97 167 12.57
14 2022-04-09 10138 4.40 890 1.01 1105 0.18 1873 0.64 2695 12.54 3416 1.90 159 12.58
15 2022-04-16 11079 3.74 1063 1.98 1430 0.21 1908 1.21 2583 11.92 3960 1.21 135 8.15
16 2022-04-23 12929 3.20 1336 1.27 2447 0.12 1862 0.43 2981 10.27 4098 1.49 205 9.27
17 2022-04-30 14249 2.99 910 1.32 3738 0.27 2159 1.44 3019 9.87 4206 1.47 217 5.99

Positive human parainfluenza virus (HPIV) tests

Figure 5: Positive human parainfluenza virus (HPIV) tests (%) in Canada by region by surveillance week
Figure 5
Figure 5: 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 2021-09-04 2637 5.99 580 1.38 138 5.07 857 14.47 739 1.89 315 1.59
36 2021-09-11 2884 4.92 653 2.91 149 4.03 805 11.55 955 1.57 317 2.84
37 2021-09-18 3467 5.97 978 3.89 139 0.72 1100 10.73 858 3.03 386 6.22
38 2021-09-25 3783 4.73 1083 3.69 222 0.45 1113 8.18 857 2.33 506 5.34
39 2021-10-02 4050 8.12 1070 4.86 232 1.72 1461 13.07 765 5.88 517 7.16
40 2021-10-09 3822 8.19 721 6.38 314 1.27 1542 12.39 717 5.58 524 6.11
41 2021-10-16 3574 10.46 543 6.45 335 0.90 1461 13.76 725 7.31 510 16.08
42 2021-10-23 4017 10.01 628 5.41 454 0.44 1631 11.77 769 8.19 531 20.90
43 2021-10-30 4170 9.38 822 2.92 414 0.97 1541 11.29 778 8.10 608 20.72
44 2021-11-06 3942 10.27 415 10.84 293 0.34 1690 10.00 835 8.26 708 17.09
45 2021-11-13 4483 9.97 708 6.78 317 0.95 1772 8.47 864 9.72 819 19.78
46 2021-11-20 4413 8.29 597 4.02 349 0.57 1735 6.80 975 9.33 756 17.33
47 2021-11-27 4787 7.04 575 4.35 475 0.84 1968 5.95 1058 7.84 709 15.23
48 2021-12-04 4768 5.77 668 3.29 355 1.13 2055 3.94 960 7.60 723 13.14
49 2021-12-11 5520 3.97 684 1.02 317 0.63 2722 2.94 1063 7.34 733 7.09
50 2021-12-18 5852 3.23 677 2.51 356 1.69 3058 1.60 1020 6.18 741 7.29
51 2021-12-25 5476 3.01 311 0.64 383 3.39 3031 1.55 997 6.12 751 5.59
52 2022-01-01 5124 2.13 132 1.52 287 0.35 2746 0.87 1198 3.92 760 4.61
1 2022-01-08 5049 1.84 59 1.69 228 1.32 2757 0.62 1439 2.64 558 5.91
2 2022-01-15 5216 1.19 66 3.03 776 0.26 2166 0.32 1609 1.55 597 4.36
3 2022-01-22 4459 0.76 202 0.50 196 1.02 1892 0.26 1414 1.27 753 1.06
4 2022-01-29 4392 0.64 144 1.39 208 0.48 1846 0.27 1426 0.84 766 1.04
5 2022-02-05 3959 0.48 193 1.04 169 0.00 1623 0.12 1255 0.32 715 1.54
6 2022-02-12 3514 0.51 188 0.53 214 0.00 1486 0.20 972 0.51 651 1.38
7 2022-02-19 3163 0.44 233 0.00 166 0.60 1397 0.29 806 0.74 557 0.54
8 2022-02-26 3003 0.73 253 0.00 175 1.14 1262 0.16 732 1.09 579 1.73
9 2022-03-05 3180 0.60 206 0.49 190 1.05 1349 0.15 908 0.66 523 1.53
10 2022-03-12 3104 0.68 243 0.00 195 2.05 1266 0.16 863 0.58 531 1.69
11 2022-03-19 3039 0.66 245 0.82 245 0.41 1187 0.25 902 1.00 460 1.09
12 2022-03-19 3251 1.05 205 1.46 258 1.16 1288 0.78 914 0.55 580 2.24
13 2022-04-02 3446 1.39 227 1.32 251 3.59 1363 0.37 1026 1.27 577 3.12
14 2022-04-09 3646 1.18 196 1.53 332 3.01 1286 0.31 1282 1.64 544 0.92
15 2022-04-16 3858 1.35 206 1.46 419 3.10 1229 0.49 1309 1.99 694 0.58
16 2022-04-23 3826 2.20 277 0.36 273 6.59 1242 1.05 1369 2.48 660 2.58
17 2022-04-30 4247 1.60 102 3.92 630 1.27 1496 1.00 1357 2.06 658 1.98

Positive adenovirus (ADV) tests

Figure 6: Positive adenovirus (ADV) tests (%) in Canada by region by surveillance week
Figure 6
Figure 6: 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 2021-09-04 2629 1.18 573 1.05 137 4.38 857 1.52 739 0.54 315 0.32
36 2021-09-11 2882 1.15 653 0.61 147 4.76 805 1.61 955 0.63 317 0.95
37 2021-09-18 3469 0.81 980 0.51 138 0.00 1101 1.45 858 0.23 386 1.04
38 2021-09-25 3780 0.82 1083 0.46 219 2.28 1113 0.54 857 0.47 506 2.17
39 2021-10-02 4051 1.14 1071 0.28 232 3.45 1461 1.37 765 1.18 517 1.16
40 2021-10-09 3822 1.31 721 0.14 314 1.91 1542 1.95 717 1.67 524 0.19
41 2021-10-16 3574 1.37 543 0.18 335 5.07 1461 1.57 725 0.97 510 0.20
42 2021-10-23 4018 2.54 628 0.00 455 11.87 1631 2.33 769 0.91 531 0.56
43 2021-10-30 4187 1.15 836 0.12 417 3.12 1541 1.56 778 1.03 608 0.33
44 2021-11-06 3942 1.42 415 0.96 293 1.02 1690 1.60 835 1.44 708 1.41
45 2021-11-13 4480 1.61 705 0.71 317 6.62 1772 1.47 864 1.04 819 1.22
46 2021-11-20 4421 2.51 598 0.50 356 7.30 1735 2.25 975 2.05 756 3.04
47 2021-11-27 4693 1.94 576 0.69 380 3.68 1968 2.69 1058 0.76 709 1.69
48 2021-12-04 4816 1.89 668 0.75 403 4.71 2055 1.95 960 1.46 723 1.80
49 2021-12-11 5614 2.48 684 0.88 411 4.87 2722 3.23 1063 1.03 733 1.91
50 2021-12-18 5999 2.72 677 0.74 503 6.56 3058 2.88 1020 1.67 741 2.70
51 2021-12-25 5474 2.54 314 1.59 378 7.41 3031 2.18 997 1.20 751 3.73
52 2022-01-01 5163 1.92 133 3.76 324 5.56 2747 1.49 1198 1.25 760 2.63
1 2022-01-08 5163 1.84 105 3.81 296 7.43 2757 1.38 1439 0.83 558 3.41
2 2022-01-15 4761 1.13 66 1.52 320 2.19 2167 0.51 1609 1.24 597 2.51
3 2022-01-22 4494 1.34 200 0.50 234 5.98 1892 1.16 1413 0.71 753 1.73
4 2022-01-29 4497 1.18 144 0.69 313 3.19 1846 1.14 1426 0.56 766 1.70
5 2022-02-05 3959 1.57 193 3.63 169 6.51 1623 1.42 1255 0.72 715 1.68
6 2022-02-12 3539 1.44 188 1.60 239 5.02 1486 1.14 972 0.62 651 2.00
7 2022-02-19 3163 1.52 233 2.58 166 7.83 1397 0.72 806 0.99 557 1.97
8 2022-02-26 3035 1.85 254 1.97 205 8.29 1263 0.87 732 1.78 579 1.73
9 2022-03-05 3206 1.90 207 1.93 215 7.44 1349 1.26 908 1.10 523 2.68
10 2022-03-12 3138 1.98 243 0.41 229 7.86 1266 1.11 863 1.74 531 2.64
11 2022-03-19 3039 1.88 245 1.63 245 4.90 1187 0.84 902 2.33 460 2.17
12 2022-03-26 3283 1.71 205 0.49 290 3.45 1288 1.40 914 1.97 580 1.55
13 2022-04-02 3486 2.29 227 0.44 291 8.93 1363 1.10 1026 1.95 577 3.12
14 2022-04-09 3686 1.74 196 1.53 372 4.84 1286 1.24 1282 1.17 544 2.21
15 2022-04-16 3922 1.71 206 2.43 483 2.48 1229 1.30 1309 1.38 694 2.31
16 2022-04-23 3917 1.84 277 1.08 364 4.95 1242 1.21 1369 1.39 660 2.58
17 2022-04-30 4470 1.54 102 1.96 852 2.82 1496 0.80 1358 1.18 658 2.13

Positive human metapneumovirus (HMPV) tests

Figure 7: Positive human metapneumovirus (HMPV) tests (%) in Canada by region by surveillance week
Figure 7
Figure 7: 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 2021-09-04 2665 0.23 580 0.00 138 2.17 832 0.36 792 0.00 315 0.00
36 2021-09-11 2935 0.24 653 0.00 149 0.67 796 0.50 1015 0.20 317 0.00
37 2021-09-18 3488 0.17 978 0.00 138 1.45 1073 0.19 907 0.11 386 0.26
38 2021-09-25 3810 0.37 1083 0.00 219 1.83 1086 0.74 914 0.00 506 0.40
39 2021-10-02 4057 0.17 1070 0.00 232 0.86 1428 0.21 809 0.00 513 0.39
40 2021-10-09 3769 0.16 721 0.00 238 1.26 1503 0.20 779 0.00 524 0.00
41 2021-10-16 3495 0.20 543 0.18 229 0.87 1436 0.07 777 0.00 510 0.59
42 2021-10-23 3877 0.15 628 0.00 276 0.36 1611 0.12 827 0.00 531 0.56
43 2021-10-30 4115 0.36 836 0.00 313 3.51 1510 0.13 841 0.24 608 0.00
44 2021-11-06 3903 0.77 415 0.00 210 6.19 1663 0.24 906 0.33 708 1.41
45 2021-11-13 4537 0.64 705 0.14 325 4.92 1742 0.17 943 0.21 819 0.85
46 2021-11-20 4435 0.99 597 0.17 349 8.02 1704 0.35 1028 0.49 756 0.53
47 2021-11-27 4739 1.01 575 0.52 380 8.68 1968 0.46 1105 0.00 709 0.42
48 2021-12-04 4875 1.48 668 0.45 403 12.90 2055 0.44 1019 0.29 723 0.69
49 2021-12-11 5658 1.22 684 0.88 411 9.98 2721 0.55 1108 0.54 733 0.14
50 2021-12-18 5920 1.08 677 0.30 397 11.08 3057 0.46 1048 0.38 741 0.00
51 2021-12-25 5508 1.20 311 2.89 378 12.17 3031 0.13 1034 0.29 751 0.53
52 2022-01-01 5190 1.00 132 1.52 321 10.28 2746 0.36 1230 0.16 760 0.66
1 2022-01-08 5173 0.72 101 1.98 295 8.14 2757 0.07 1454 0.21 558 1.08
2 2022-01-15 4797 0.38 66 4.55 320 0.94 2166 0.14 1646 0.43 597 0.34
3 2022-01-22 4500 0.24 202 0.00 227 3.08 1890 0.00 1426 0.21 753 0.13
4 2022-01-29 4429 0.23 144 1.39 228 1.32 1846 0.16 1443 0.14 766 0.00
5 2022-02-05 4038 0.25 193 2.07 233 0.86 1623 0.12 1270 0.08 715 0.14
6 2022-02-12 3549 0.42 188 2.13 239 2.51 1486 0.07 982 0.20 651 0.31
7 2022-02-19 3179 0.44 233 0.86 166 4.22 1397 0.00 822 0.61 557 0.00
8 2022-02-26 3038 0.53 253 0.79 205 3.41 1259 0.08 740 0.68 579 0.17
9 2022-03-05 3233 0.40 206 0.00 235 2.13 1348 0.07 917 0.65 523 0.19
10 2022-03-12 3152 0.51 243 0.41 230 1.74 1266 0.24 876 0.80 531 0.19
11 2022-03-19 3048 0.59 245 1.22 245 1.63 1186 0.00 912 0.66 460 1.09
12 2022-03-26 3367 0.77 205 1.46 367 1.09 1287 0.23 922 1.08 580 1.03
13 2022-04-02 3506 1.28 227 2.20 291 1.72 1363 0.95 1046 1.53 577 1.04
14 2022-04-09 3731 1.45 196 3.57 372 1.88 1285 1.25 1328 1.66 544 0.37
15 2022-04-16 3952 1.52 206 1.46 483 1.86 1225 1.71 1343 1.49 694 1.01
16 2022-04-23 3937 2.18 277 2.17 363 2.20 1237 1.70 1395 2.72 660 1.97
17 2022-04-30 4529 2.63 102 17.65 857 1.75 1496 1.87 1412 3.05 658 2.28

Positive enterovirus/rhinovirus (EV/RV) tests

Figure 8: Positive enterovirus/rhinovirus (EV/RV) tests (%) in Canada by region by surveillance week
Figure 8
Figure 8: 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 2021-09-04 2535 21.97 580 21.21 N.A. N.A. 857 26.49 739 21.52 311 14.15
36 2021-09-11 2745 18.62 653 15.62 N.A. N.A. 805 21.24 955 18.74 311 18.01
37 2021-09-18 3336 27.46 978 33.44 N.A. N.A. 1104 27.72 858 22.26 378 23.02
38 2021-09-25 3558 33.16 1083 43.40 N.A. N.A. 1113 31.63 857 25.20 497 27.97
39 2021-10-02 3821 30.02 1070 32.52 N.A. N.A. 1461 32.44 765 21.31 513 30.99
40 2021-10-09 3506 26.24 721 17.48 N.A. N.A. 1542 33.01 717 23.85 515 21.75
41 2021-10-16 3243 22.91 543 16.21 N.A. N.A. 1461 27.24 725 15.17 502 28.88
42 2021-10-23 3555 22.17 628 11.78 N.A. N.A. 1631 25.32 769 21.98 515 25.05
43 2021-10-30 3712 19.64 836 7.06 N.A. N.A. 1540 24.68 778 19.15 539 25.97
44 2021-11-06 3624 21.44 415 16.39 N.A. N.A. 1675 23.28 835 17.96 689 24.38
45 2021-11-13 4161 22.40 709 12.83 N.A. N.A. 1766 27.18 864 21.06 812 21.55
46 2021-11-20 4067 21.37 597 13.57 N.A. N.A. 1735 23.34 975 21.85 743 22.21
47 2021-11-27 4290 18.53 575 11.83 N.A. N.A. 1951 21.78 1058 16.07 694 18.88
48 2021-12-04 4431 16.61 668 10.93 N.A. N.A. 2053 18.56 960 15.31 708 17.23
49 2021-12-11 5206 14.56 684 11.11 N.A. N.A. 2713 14.19 1063 14.77 716 18.30
50 2021-12-18 5522 12.39 677 7.68 N.A. N.A. 3058 10.99 1020 13.24 734 20.57
51 2021-12-25 5104 9.95 311 9.00 N.A. N.A. 3031 7.06 997 12.04 733 18.55
52 2022-01-01 4854 7.70 132 11.36 N.A. N.A. 2746 5.39 1198 9.93 747 11.91
1 2022-01-08 4902 5.71 104 6.73 N.A. N.A. 2757 2.76 1439 7.23 544 15.26
2 2022-01-15 4472 3.98 66 1.52 N.A. N.A. 2166 1.85 1609 4.54 588 10.37
3 2022-01-22 4275 3.11 202 2.97 N.A. N.A. 1892 1.48 1413 4.18 732 5.19
4 2022-01-29 4204 2.59 144 1.39 N.A. N.A. 1846 1.08 1426 3.44 753 5.05
5 2022-02-05 3814 3.02 193 1.55 N.A. N.A. 1623 1.79 1255 4.46 700 3.71
6 2022-02-12 3317 3.86 188 1.06 N.A. N.A. 1486 2.49 972 4.63 645 6.82
7 2022-02-19 3015 4.44 233 0.43 N.A. N.A. 1397 3.08 806 3.85 553 10.13
8 2022-02-26 2841 6.30 253 1.98 N.A. N.A. 1262 5.07 732 6.56 571 10.51
9 2022-03-05 3002 7.76 206 6.80 N.A. N.A. 1349 6.15 908 7.82 514 12.45
10 2022-03-12 2926 8.20 243 5.35 N.A. N.A. 1266 6.08 863 9.04 523 13.38
11 2022-03-19 2822 8.93 245 7.35 N.A. N.A. 1187 7.67 902 9.76 452 12.17
12 2022-03-26 3052 9.47 205 3.41 N.A. N.A. 1288 6.75 914 11.71 572 14.51
13 2022-04-02 3246 8.44 227 9.25 N.A. N.A. 1363 7.34 1026 8.87 562 10.68
14 2022-04-09 3367 9.21 196 8.16 N.A. N.A. 1286 7.54 1282 10.53 530 10.57
15 2022-04-16 3461 9.10 206 12.62 N.A. N.A. 1229 6.35 1309 8.40 682 14.52
16 2022-04-23 3593 8.13 277 7.94 N.A. N.A. 1242 6.20 1369 7.60 645 12.40
17 2022-04-30 3696 8.04 102 15.69 N.A. N.A. 1496 7.49 1358 7.58 646 8.51

Positive human coronavirus (HCoV) tests

Figure 9: Positive human coronavirus (HCoV) tests (%) in Canada by region by surveillance week
Figure 9
Figure 9: 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 2021-09-04 1992 1.05 98 0.00 138 0.00 645 1.71 792 1.01 311 0.64
36 2021-09-11 2262 0.62 202 0.00 149 0.00 584 1.03 1015 0.69 307 0.33
37 2021-09-18 2477 0.44 247 0.40 131 0.00 809 0.49 906 0.55 378 0.26
38 2021-09-25 2552 0.67 130 0.00 221 0.00 788 1.14 914 0.88 497 0.00
39 2021-10-02 2721 0.62 120 0.00 232 0.43 1042 0.38 809 1.48 513 0.00
40 2021-10-09 2986 0.57 332 0.30 238 0.00 1118 0.81 779 0.77 515 0.19
41 2021-10-16 2844 1.69 250 1.60 335 0.90 1032 1.55 725 2.90 502 0.80
42 2021-10-23 3351 1.07 353 0.28 453 0.22 1200 1.33 827 1.81 515 0.58
43 2021-10-30 3332 1.05 601 0.67 313 0.64 1042 1.34 778 1.80 593 0.17
44 2021-11-06 3029 2.21 154 3.90 210 2.38 1069 1.87 906 3.64 689 0.44
45 2021-11-13 3464 2.54 326 0.92 317 0.32 1142 2.19 864 6.71 812 0.12
46 2021-11-20 3478 3.05 310 2.90 349 0.86 1047 2.77 1028 4.96 743 1.88
47 2021-11-27 3898 3.93 305 3.61 475 1.47 1317 3.80 1105 6.88 694 1.30
48 2021-12-04 3792 4.96 368 4.89 465 1.94 1225 4.90 1019 8.93 708 1.41
49 2021-12-11 3830 6.58 369 5.42 356 1.97 1281 7.18 1108 11.01 715 1.54
50 2021-12-18 3815 7.29 356 6.18 496 3.02 1181 9.31 1048 10.21 734 3.27
51 2021-12-25 3131 8.18 69 10.14 378 2.91 914 10.83 1034 10.15 733 4.64
52 2022-01-01 3204 10.36 124 14.52 320 2.50 782 14.58 1230 11.63 747 6.56
1 2022-01-08 3367 9.27 99 4.04 296 8.45 966 10.87 1454 9.42 544 7.54
2 2022-01-15 3364 7.49 59 3.39 412 1.21 657 11.26 1646 8.81 588 4.42
3 2022-01-22 3100 4.97 186 1.08 226 2.65 529 6.43 1425 6.32 732 3.01
4 2022-01-29 3211 3.92 108 0.00 312 3.21 593 6.24 1443 4.92 753 1.06
5 2022-02-05 2755 2.83 68 1.47 233 2.15 480 3.33 1270 3.15 700 2.29
6 2022-02-12 2329 3.01 84 0.00 239 1.26 376 3.72 982 3.67 645 2.64
7 2022-02-19 2037 3.24 100 0.00 201 1.00 357 3.64 822 4.38 553 2.71
8 2022-02-26 1962 3.67 124 0.81 194 2.06 331 4.83 740 2.16 571 6.13
9 2022-03-05 2136 3.32 106 0.94 208 0.48 387 6.72 917 2.29 514 4.28
10 2022-03-12 2148 3.86 104 0.96 274 1.09 365 4.93 876 2.97 523 6.69
11 2022-03-19 2064 3.25 104 2.88 275 0.73 321 5.30 912 2.85 452 4.20
12 2022-03-26 2376 4.38 83 1.20 363 1.93 431 5.57 922 3.15 571 7.36
13 2022-04-02 2471 4.45 83 1.20 328 2.13 450 5.78 1046 2.68 562 8.54
14 2022-04-09 2733 4.24 83 6.02 318 4.09 468 3.85 1328 3.39 530 6.60
15 2022-04-16 3079 5.00 105 6.67 465 3.44 484 6.40 1342 2.83 682 9.09
16 2022-04-23 3155 4.91 197 2.03 327 6.73 586 5.97 1395 3.08 645 7.91
17 2022-04-30 3606 4.91 102 4.90 723 5.26 720 5.83 1411 2.69 646 8.36

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