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Respiratory Virus Report, week 43 - ending October 30, 2021

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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

In week 43 (October 24 to October 30, 2021):

  • Respiratory syncytial virus (1,007 detections; 9.3% positive), enterovirus/rhinovirus (608 detections; 22.0% positive), and human parainfluenza virus (316 detections; 10.0% positive) are the most common seasonal respiratory viruses detected in Canada.
    • Activity of respiratory syncytial virus remains well above expected levels. The majority of detections are found in Quebec and Eastern Ontario.
    • Activity of enterovirus/rhinovirus is within expected levels for this time of year.
    • Activity of human parainfluenza virus remains well above expected levels.
  • Detections of other respiratory viruses are low.
  • The number of tests performed for all viruses are above expected levels.
  • 30/34 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 October 30, 2021 (surveillance week 2021-43)
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 74 0 0 0 0 0 74 0 74 0 0 7 0 0 74 0 74 0 74 22 74 3
Nova Scotia 74 0 0 0 0 0 74 1 38 0 0 2 0 0 38 0 38 0 38 3 38 0
New Brunswick 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.
Atlantic 148 0 0 0 0 0 148 1 112 0 0 9 0 0 112 0 112 0 112 25 112 3
Région Nord-Est 472 0 0 0 0 0 359 138 103 0 0 1 0 0 103 1 2 0 N.C. N.C. 2 0
Québec-Chaudière-Appalaches 336 0 0 0 0 0 392 172 28 0 0 0 0 0 31 2 28 0 N.C. N.C. 28 1
Centre-du-Québec 146 0 0 0 0 0 205 94 14 0 0 0 0 0 14 0 14 0 N.C. N.C. 14 0
Montréal-Laval 677 0 0 1 1 0 677 100 269 0 0 3 0 0 269 10 269 11 N.C. N.C. 269 1
Ouest du Québec 248 0 0 0 0 0 248 112 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Montérégie 115 0 0 0 0 0 115 21 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 1994 0 0 1 1 0 1996 637 414 0 0 4 0 0 417 13 313 11 N.C. N.C. 313 2
P.H.O.L. - Ottawa 378 0 0 0 0 0 378 117 378 0 0 0 0 39 378 15 378 1 378 133 378 6
EORLA 164 0 0 0 0 0 164 19 31 0 0 3 0 0 31 0 0 0 31 6 0 0
P.H.O.L. - Kingston 40 0 0 0 0 0 40 2 40 0 0 0 0 11 40 0 40 0 40 20 40 0
UHN / Mount Sinai Hospital 436 0 0 0 0 0 436 0 15 0 0 0 0 0 15 0 15 0 15 2 15 0
P.H.O.L. - Toronto 308 0 0 0 0 0 308 16 308 0 0 0 0 22 308 2 308 0 308 60 308 7
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 9 0 0 0 0 0 9 0 9 0 0 0 0 1 9 0 9 0 9 4 9 0
P.H.O.L. - Timmins 3 0 0 0 0 0 3 0 3 0 0 0 0 0 3 0 3 0 3 1 3 0
St. Joseph's - London 75 0 0 0 0 0 75 8 28 0 0 0 0 3 28 0 28 0 27 13 27 0
P.H.O.L. - London 111 0 0 0 0 0 111 3 111 0 0 0 0 17 111 2 111 0 111 34 111 1
P.H.O.L. - Orillia 36 0 0 0 0 0 36 2 36 0 0 0 0 5 36 1 36 0 36 12 36 0
P.H.O.L. - Thunder Bay 6 0 0 0 0 0 6 0 6 0 0 0 0 0 6 0 6 0 6 1 6 0
P.H.O.L. - Sudbury 6 0 0 0 0 0 6 0 6 0 0 0 0 0 6 0 6 1 6 0 6 0
P.H.O.L. - Hamilton 53 0 0 0 0 0 53 4 53 0 0 0 0 6 53 1 53 0 53 11 53 0
P.H.O.L. - Peterborough 10 0 0 0 0 0 10 0 9 0 0 0 0 0 9 0 9 0 9 2 9 0
St. Joseph's - Hamilton 467 0 0 0 0 0 467 37 467 0 0 61 0 0 467 3 467 0 467 63 0 0
Province of Ontario 2102 0 0 0 0 0 2102 208 1500 0 0 64 0 104 1500 24 1469 2 1499 362 1001 14
Province of Manitoba 1852 0 1 1 2 0 1852 13 29 0 1 3 0 0 29 1 92 0 29 12 29 0
Province of Saskatchewan 930 0 0 0 0 0 930 2 70 0 0 1 1 0 70 0 70 0 70 12 70 0
Province of Alberta 1702 0 0 0 0 0 626 19 626 0 0 48 3 0 626 4 626 0 626 113 626 13
Prairies 4484 0 1 1 2 0 3408 34 725 0 1 52 4 0 725 5 788 0 725 137 725 13
British Columbia 2920 0 0 0 0 2 2920 127 420 0 0 63 4 11 420 2 405 0 405 83 405 1
Yukon 210 0 0 0 1 1 210 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 16 0 0 0 0 0 15 0 3 0 0 0 0 0 3 0 3 0 15 1 3 0
Nunavut 3 0 0 0 0 0 3 0 3 0 0 0 0 0 3 0 3 0 3 0 1 0
Territories 229 0 0 0 1 1 228 0 6 0 0 0 0 0 6 0 6 0 18 1 4 0
CANADA 11877 0 1 2 4 3 10802 1007 3177 0 1 192 8 115 3180 44 3093 13 2759 608 2560 33

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.

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), Northwest Territories (NT) and Nunavut (NU) are sent to reference laboratories in other provinces and reported results reflect specimens identified as originating from YT, NT or NU.

Results from British Columbia (BC) 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 BC and YT, 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 October 30, 2021 (surveillance weeks 2021-35 to 2021-43)
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 4433 0 0 0 0 0 4433 8 4433 0 3 54 0 47 4436 12 4433 1 4433 1402 N.C. N.C.
Prince Edward Island 721 0 0 0 0 0 721 0 721 0 0 132 0 0 721 10 721 0 721 220 721 10
Nova Scotia 586 0 0 0 0 0 586 4 439 0 2 25 0 0 439 3 439 0 439 47 439 0
New Brunswick 957 0 0 0 0 0 857 3 775 0 0 18 0 0 768 0 775 0 775 14 684 0
Atlantic 6697 0 0 0 0 0 6597 15 6368 0 5 229 0 47 6364 25 6368 1 6368 1683 1844 10
Région Nord-Est 4155 0 0 0 0 0 2159 833 395 0 0 5 0 0 395 10 11 0 N.C. N.C. 294 2
Québec-Chaudière-Appalaches 870 0 0 0 0 2 1363 588 239 0 0 4 0 0 240 8 159 0 N.C. N.C. 161 1
Centre-du-Québec 890 0 0 0 0 0 1255 644 181 0 0 9 0 0 181 4 181 0 N.C. N.C. 174 0
Montréal-Laval 5745 0 0 2 2 3 5750 2007 1578 1 0 13 0 0 1578 94 1578 29 N.C. N.C. 1578 4
Ouest du Québec 1316 0 0 0 0 0 1284 581 4 0 0 0 0 0 0 0 3 0 N.C. N.C. 3 0
Montérégie 765 0 0 0 0 0 765 288 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 13741 0 0 2 2 5 12576 4941 2397 1 0 31 0 0 2394 116 1932 29 N.C. N.C. 2210 7
P.H.O.L. - Ottawa 3441 1 1 0 2 0 3441 746 3441 0 0 0 0 441 3441 122 3440 14 3441 1388 3440 58
EORLA 1180 0 0 0 0 0 1155 132 232 0 0 9 0 0 232 1 1 0 232 51 25 1
P.H.O.L. - Kingston 405 0 0 0 0 0 405 12 404 0 0 0 0 105 404 6 403 1 404 164 403 7
UHN / Mount Sinai Hospital 3712 0 0 1 1 0 3712 6 138 0 0 0 0 0 138 0 138 0 138 7 138 0
P.H.O.L. - Toronto 2161 0 1 0 1 0 2160 50 2160 0 0 0 0 150 2161 13 2160 2 2160 414 2161 21
Sick Kids Hospital - Toronto 222 0 0 0 0 0 0 0 222 0 0 17 0 0 222 1 222 1 222 59 222 0
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 35 0 0 0 0 0 35 0 35 0 0 0 0 1 35 0 35 0 35 12 35 0
P.H.O.L. - Timmins 58 0 0 0 0 0 58 2 58 0 0 0 0 4 58 0 58 0 58 10 58 0
St. Joseph's - London 351 0 0 0 0 0 351 17 301 0 0 7 0 41 301 8 301 1 304 73 303 0
P.H.O.L. - London 550 0 0 0 0 0 550 8 550 0 0 0 0 80 550 7 550 0 550 165 550 2
P.H.O.L. - Orillia 142 0 0 0 0 0 142 5 142 0 0 0 0 18 142 3 140 1 142 51 140 0
P.H.O.L. - Thunder Bay 64 0 0 0 0 0 64 0 64 0 0 0 0 0 64 0 64 0 64 30 64 0
P.H.O.L. - Sudbury 123 0 0 0 0 0 123 0 123 0 0 0 0 2 123 0 123 1 123 22 123 0
P.H.O.L. - Hamilton 295 0 1 0 1 0 292 5 292 0 0 0 0 27 292 3 292 4 292 86 292 0
P.H.O.L. - Peterborough 140 0 0 0 0 0 140 6 139 0 0 0 0 5 139 1 138 0 139 29 138 0
St. Joseph's - Hamilton 3048 0 0 0 0 0 3042 113 3042 0 0 440 0 0 3042 16 3042 3 3042 608 0 0
Province of Ontario 15927 1 3 1 5 0 15670 1102 11343 0 0 473 0 874 11344 181 11107 28 11346 3169 8092 89
Manitoba 14323 1 1 2 4 0 14323 50 235 1 1 11 0 0 235 5 733 2 235 101 618 2
Province of Saskatchewan 3087 0 0 0 0 0 3059 12 698 0 0 16 3 0 698 9 698 0 698 155 697 0
Province of Alberta 15888 0 1 2 3 0 6177 81 6177 0 3 273 25 0 6177 42 6177 1 6177 1239 6177 93
Prairies 33298 1 2 4 7 0 23559 143 7110 1 4 300 28 0 7110 56 7608 3 7110 1495 7492 95
British Columbia 14830 0 1 2 4 3 14830 317 4028 0 0 342 25 38 4028 32 4009 11 3949 954 3945 13
Yukon 1964 0 0 1 2 2 2036 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.
Northwest Territories 162 0 0 0 0 0 150 0 29 0 0 0 0 0 29 2 29 0 149 22 29 0
Nunavut 11 0 0 0 0 0 9 0 9 0 0 0 0 0 9 0 9 0 9 4 6 0
Territories 2137 0 0 1 2 2 2195 3 38 0 0 0 0 0 38 2 38 0 158 26 35 0
CANADA 86630 2 6 10 20 10 75427 6521 31284 2 9 1375 53 959 31278 412 31062 72 28931 7327 23618 214

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.

Specimens from Yukon (YT), Northwest Territories (NT) and Nunavut (NU) are sent to reference laboratories in other provinces and reported results reflect specimens identified as originating from YT, NT or NU.

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

Results from British Columbia (BC) 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. Due to these delays, the sum of weekly report totals do not add up to cumulative totals.

For BC and YT, 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 4.99 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 7.55 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 0.04 0.00 1.59 0.36 0.87 0.00 0.00 0.19 0.04 0.12 8.56 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 27.51 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 8.07 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 9.36 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 9.25 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 10.39 0.10 1.74 0.58 0.98 10.29 0.06 3.70 1.94 2.74 1.39 0.37 1.91 1.28 1.70 0.20 0.19 0.95 0.04 0.46 22.63 15.48 33.62 26.94 29.81 1.72 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 8.52 0.07 2.11 0.63 1.14 9.93 0.06 3.89 2.64 3.20 2.53 0.47 2.38 1.47 1.86 0.16 0.06 0.89 0.15 0.38 22.01 13.60 32.62 24.54 27.82 1.10 0.00 1.18 0.20 0.49
43 2021-10-30 0.03 0.01 5.23 0.68 2.60 0.03 0.00 0.55 0.06 0.23 9.32 0.07 2.16 0.55 1.32 9.95 0.07 3.98 3.18 3.56 1.38 0.37 2.42 1.63 1.96 0.42 0.02 1.64 0.12 0.57 22.04 13.14 28.73 21.67 24.95 1.29 0.00 2.35 0.27 0.75

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 6 911 11 628 4
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
41 362 49 7 721 48 932 6
42 392 100 6 767 36 902 6
43 316 44 13 608 33 1 007 7

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 6896 0.04 0.00 625 0.00 0.00 848 0.12 0.00 1305 0.00 0.00 2848 0.04 0.00 1025 0.10 0.00 245 0.00 0.00
36 2021-09-11 7686 0.01 0.00 675 0.00 0.00 1369 0.00 0.00 1224 0.08 0.00 3301 0.00 0.00 930 0.00 0.00 187 0.00 0.00
37 2021-09-18 8899 0.04 0.00 1009 0.00 0.00 1718 0.00 0.00 1543 0.13 0.00 3454 0.06 0.00 985 0.00 0.00 190 0.00 0.00
38 2021-09-25 9353 0.00 0.00 1141 0.00 0.00 1502 0.00 0.00 1647 0.00 0.00 3640 0.00 0.00 1192 0.00 0.00 231 0.00 0.00
39 2021-10-02 9370 0.01 0.00 1052 0.00 0.00 1089 0.00 0.00 1954 0.00 0.00 3481 0.03 0.00 1611 0.00 0.00 183 0.00 0.00
40 2021-10-09 10493 0.00 0.02 799 0.00 0.00 1641 0.00 0.12 2059 0.00 0.00 3890 0.00 0.00 1823 0.00 0.00 281 0.00 0.00
41 2021-10-16 10022 0.03 0.03 614 0.00 0.00 1704 0.00 0.18 1893 0.05 0.00 3630 0.03 0.00 1904 0.05 0.00 277 0.00 0.00
42 2021-10-23 12030 0.03 0.02 634 0.00 0.00 1876 0.00 0.00 2199 0.05 0.00 4567 0.00 0.00 2440 0.08 0.04 314 0.32 0.32
43 2021-10-30 11877 0.03 0.03 148 0.00 0.00 1994 0.05 0.00 2102 0.00 0.00 4484 0.04 0.00 2920 0.00 0.07 229 0.44 0.44

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 5726 4.99 613 0.00 693 37.95 1277 1.49 1874 0.05 1025 0.29 244 0.00
36 2021-09-11 6346 7.55 671 0.60 1069 39.85 1187 3.12 2233 0.22 930 0.54 256 0.78
37 2021-09-18 7340 8.56 997 0.40 1310 40.76 1498 5.07 2362 0.30 985 0.71 188 0.00
38 2021-09-25 8038 8.07 1135 0.00 1356 41.67 1612 3.97 2513 0.32 1192 1.01 230 0.00
39 2021-10-02 8239 9.36 1052 0.10 1104 53.53 1913 7.42 2377 0.55 1611 1.49 182 0.00
40 2021-10-09 9376 9.25 792 0.38 1583 39.36 2015 9.43 2884 0.76 1823 1.59 279 0.00
41 2021-10-16 8966 10.39 608 0.16 1676 42.78 1867 8.36 2635 0.72 1904 2.00 276 0.36
42 2021-10-23 10592 8.52 581 0.17 1789 32.70 2198 9.55 3272 1.04 2440 2.95 312 0.00
43 2021-10-30 10802 9.32 148 0.68 1996 31.91 2102 9.90 3408 1.00 2920 4.35 228 0.00

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 3465 5.97 978 3.89 139 0.72 1099 10.74 857 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 3517 10.29 543 6.45 335 0.90 1404 13.46 725 7.31 510 16.08
42 2021-10-23 3947 9.93 628 5.41 454 0.44 1561 11.66 769 8.19 531 20.90
43 2021-10-30 3177 9.95 112 8.04 414 0.97 1500 11.20 725 7.86 420 18.57

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 3468 0.81 980 0.51 138 0.00 1101 1.45 857 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 3517 1.39 543 0.18 335 5.07 1404 1.64 725 0.97 510 0.20
42 2021-10-23 3948 2.53 628 0.00 455 11.87 1561 2.31 769 0.91 531 0.56
43 2021-10-30 3180 1.38 112 0.00 417 3.12 1500 1.60 725 0.69 420 0.48

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 3486 0.17 978 0.00 138 1.45 1072 0.19 906 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 3438 0.20 543 0.18 229 0.87 1379 0.07 777 0.00 510 0.59
42 2021-10-23 3807 0.16 628 0.00 276 0.36 1541 0.13 827 0.00 531 0.56
43 2021-10-30 3093 0.42 112 0.00 313 3.51 1469 0.14 788 0.00 405 0.00

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 3312 27.51 978 33.44 N.A. N.A. 1081 27.84 857 22.29 378 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 3186 22.63 543 16.21 N.A. N.A. 1404 26.78 725 15.17 502 28.88
42 2021-10-23 3485 22.01 628 11.78 N.A. N.A. 1561 25.11 769 21.98 515 25.05
43 2021-10-30 2759 22.04 112 22.32 N.A. N.A. 1499 24.15 725 18.90 405 20.49

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 2476 0.44 247 0.40 131 0.00 809 0.49 905 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 2787 1.72 250 1.60 335 0.90 975 1.64 725 2.90 502 0.80
42 2021-10-23 3281 1.10 353 0.28 453 0.22 1130 1.42 827 1.81 515 0.58
43 2021-10-30 2560 1.29 112 2.68 313 0.64 1001 1.40 725 1.79 405 0.25

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