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Respiratory Virus Report, week 40 - ending October 9, 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 40 (October 3 to October 9, 2021):

  • Enterovirus/rhinovirus (918 detections; 27.3% positive), respiratory syncytial virus (720 detections; 8.0% positive), and human parainfluenza virus (312 detections; 8.7% positive) are the most common seasonal respiratory viruses detected in Canada.
    • Activity of enterovirus/rhinovirus is near expected levels for this time of year.
    • Activity of respiratory syncytial virus is above expected levels. The majority of detections are found in Quebec and Eastern Ontario.
    • Activity of human parainfluenza virus is above expected levels.
  • Detections of other respiratory viruses are low.
  • The number of tests performed for all viruses are above expected levels.
  • 32/34 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 9, 2021 (surveillance week 2021-40)
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 389 0 0 0 0 0 389 1 389 0 0 8 0 3 389 0 389 0 389 86 N.C. N.C.
Prince Edward Island 109 0 0 0 0 0 109 0 109 0 0 25 0 0 109 1 109 0 109 29 109 1
Nova Scotia 72 0 0 0 0 0 72 1 54 0 0 6 0 0 54 0 54 0 54 7 54 0
New Brunswick 229 0 0 0 0 0 222 1 169 0 0 4 0 0 169 0 169 0 169 4 169 0
Atlantic 799 0 0 0 0 0 792 3 721 0 0 43 0 3 721 1 721 0 721 126 332 1
Région Nord-Est 555 0 0 2 2 0 303 107 1 0 0 0 0 0 1 0 1 0 N.C. N.C. 1 0
Québec-Chaudière-Appalaches 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. N.R. N.R.
Centre-du-Québec 128 0 0 0 0 0 128 79 16 0 0 1 0 0 16 0 16 0 N.C. N.C. 16 0
Montréal-Laval 653 0 0 0 0 1 652 179 221 0 0 2 0 0 221 5 221 3 N.C. N.C. 221 0
Ouest du Québec 102 0 0 0 0 0 102 63 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Montérégie 105 0 0 0 0 0 105 49 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 1543 0 0 2 2 1 1290 477 238 0 0 3 0 0 238 5 238 3 N.C. N.C. 238 0
P.H.O.L. - Ottawa 517 0 0 0 0 0 517 147 517 0 0 0 0 52 517 21 517 1 517 228 517 5
EORLA 147 0 0 0 0 0 147 23 39 0 0 1 0 0 39 0 1 0 39 9 0 0
P.H.O.L. - Kingston 46 0 0 0 0 0 46 1 46 0 0 0 0 12 46 1 46 0 46 18 46 0
UHN / Mount Sinai Hospital 419 0 0 0 0 0 419 1 12 0 0 0 0 0 12 0 12 0 12 0 12 0
P.H.O.L. - Toronto 271 0 0 0 0 0 271 4 271 0 0 0 0 17 271 6 271 0 271 54 271 4
Sick Kids Hospital - Toronto 44 0 0 0 0 0 0 0 44 0 0 2 0 0 44 0 44 0 44 16 44 0
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 6 0 0 0 0 0 6 0 6 0 0 0 0 0 6 0 6 0 6 3 6 0
P.H.O.L. - Timmins 7 0 0 0 0 0 7 0 7 0 0 0 0 0 7 0 7 0 7 3 7 0
St. Joseph's - London 32 0 0 0 0 0 32 2 31 0 0 0 0 8 31 1 31 0 31 9 30 0
P.H.O.L. - London 83 0 0 0 0 0 83 1 83 0 0 0 0 15 83 0 83 0 83 23 83 0
P.H.O.L. - Orillia 18 0 0 0 0 0 18 0 18 0 0 0 0 3 18 0 17 1 18 4 17 0
P.H.O.L. - Thunder Bay 7 0 0 0 0 0 7 0 7 0 0 0 0 0 7 0 7 0 7 5 7 0
P.H.O.L. - Sudbury 20 0 0 0 0 0 20 0 20 0 0 0 0 1 20 0 20 0 20 4 20 0
P.H.O.L. - Hamilton 38 0 0 0 0 0 38 0 38 0 0 0 0 6 38 1 38 0 38 17 38 0
P.H.O.L. - Peterborough 22 0 0 0 0 0 22 1 22 0 0 0 0 0 22 0 22 0 22 6 22 0
St. Joseph's - Hamilton 383 0 0 0 0 0 383 10 383 0 0 74 0 0 383 0 383 1 383 111 0 0
Province of Ontario 2060 0 0 0 0 0 2016 190 1544 0 0 77 0 114 1544 30 1505 3 1544 510 1120 9
Province of Manitoba 1895 0 0 0 0 0 1895 8 21 0 0 4 0 0 21 0 83 0 21 19 83 0
Province of Saskatchewan 243 0 0 0 0 0 243 1 75 0 0 0 0 0 75 3 75 0 75 19 75 0
Province of Alberta 1593 0 0 0 0 0 609 13 609 0 0 30 6 0 609 9 609 0 609 130 609 5
Prairies 3731 0 0 0 0 0 2747 22 705 0 0 34 6 0 705 12 767 0 705 168 767 5
British Columbia 1822 0 0 0 0 0 1822 28 386 0 0 30 1 1 386 1 386 0 377 112 377 0
Yukon 265 0 0 0 0 0 265 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 13 0 0 0 0 0 11 0 4 0 0 0 0 0 4 0 4 0 11 2 4 0
Nunavut 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Territories 278 0 0 0 0 0 276 0 4 0 0 0 0 0 4 0 4 0 11 2 4 0
CANADA 10233 0 0 2 2 1 8943 720 3598 0 0 187 7 118 3598 49 3621 6 3358 918 2838 15

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 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.

Influenza co-detections may cause the sum of A(H1)pdm09, A(H3), and A(UnS) positive results to exceed the sum of Total Flu A Positive results.

Table 2: Cumulative respiratory virus detections from August 29, 2021 to October 9, 2021 (surveillance weeks 2021-35 to 2021-40)
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 3865 0 0 0 0 0 3865 8 3865 0 3 32 0 41 3868 12 3865 0 3865 1313 N.C. N.C.
Prince Edward Island 427 0 0 0 0 0 427 0 427 0 0 92 0 0 427 10 427 0 427 138 427 2
Nova Scotia 344 0 0 0 0 0 344 2 283 0 2 18 0 0 283 2 283 0 283 33 283 0
New Brunswick 665 0 0 0 0 0 624 2 510 0 0 15 0 0 503 0 510 0 510 12 419 0
Atlantic 5301 0 0 0 0 0 5260 12 5085 0 5 157 0 41 5081 24 5085 0 5085 1496 1129 2
Région Nord-Est 2645 0 0 2 2 0 1112 426 7 0 0 0 0 0 7 0 7 0 N.C. N.C. 7 0
Québec-Chaudière-Appalaches 94 0 0 0 0 0 248 45 57 0 0 3 0 0 53 1 53 0 N.C. N.C. 55 0
Centre-du-Québec 458 0 0 0 0 0 587 314 99 0 0 9 0 0 99 1 99 0 N.C. N.C. 92 0
Montréal-Laval 3958 0 0 1 1 1 3960 1628 952 1 0 9 0 0 952 29 952 15 N.C. N.C. 952 1
Ouest du Québec 555 0 0 0 0 0 556 255 3 0 0 0 0 0 0 0 3 0 N.C. N.C. 3 0
Montérégie 359 0 0 0 0 0 359 188 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 8069 0 0 3 3 1 6822 2856 1118 1 0 21 0 0 1111 31 1114 15 N.C. N.C. 1109 1
P.H.O.L. - Ottawa 2208 0 1 0 1 0 2208 390 2208 0 0 0 0 315 2208 70 2207 11 2208 968 2207 37
EORLA 645 0 0 0 0 0 645 55 156 0 0 5 0 0 156 0 1 0 156 34 25 1
P.H.O.L. - Kingston 284 0 0 0 0 0 284 9 284 0 0 0 0 74 284 5 283 1 284 121 283 1
UHN / Mount Sinai Hospital 2451 0 0 1 1 0 2451 5 94 0 0 0 0 0 94 0 94 0 94 3 94 0
P.H.O.L. - Toronto 1223 0 1 0 1 0 1222 12 1222 0 0 0 0 86 1223 8 1222 2 1222 212 1223 4
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 14 0 0 0 0 0 14 0 14 0 0 0 0 0 14 0 14 0 14 6 14 0
P.H.O.L. - Timmins 45 0 0 0 0 0 45 2 45 0 0 0 0 3 45 0 45 0 45 7 45 0
St. Joseph's - London 192 0 0 0 0 0 192 6 192 0 0 7 0 18 192 2 192 1 196 42 195 0
P.H.O.L. - London 268 0 0 0 0 0 268 3 268 0 0 0 0 27 268 2 268 0 268 72 268 0
P.H.O.L. - Orillia 70 0 0 0 0 0 70 1 70 0 0 0 0 8 70 1 68 1 70 25 68 0
P.H.O.L. - Thunder Bay 40 0 0 0 0 0 40 0 40 0 0 0 0 0 40 0 40 0 40 16 40 0
P.H.O.L. - Sudbury 92 0 0 0 0 0 92 0 92 0 0 0 0 1 92 0 92 0 92 21 92 0
P.H.O.L. - Hamilton 147 0 0 0 0 0 146 1 146 0 0 0 0 12 146 2 146 4 146 48 146 0
P.H.O.L. - Peterborough 67 0 0 0 0 0 67 2 67 0 0 0 0 3 67 0 66 0 67 13 66 0
St. Joseph's - Hamilton 1766 0 0 0 0 0 1760 42 1760 0 0 232 0 0 1760 7 1760 2 1760 393 0 0
Province of Ontario 9734 0 2 1 3 0 9504 528 6880 0 0 261 0 547 6881 98 6720 23 6884 2040 4988 43
Manitoba 9205 1 0 0 1 0 9205 19 157 0 0 8 0 0 157 2 482 2 157 74 482 1
Province of Saskatchewan 695 0 0 0 0 0 667 2 487 0 0 11 2 0 487 8 487 0 487 122 486 0
Province of Alberta 10558 0 1 2 3 0 4235 35 4235 0 3 120 16 0 4235 27 4235 1 4235 880 4235 44
Prairies 20458 1 1 2 4 0 14107 56 4879 0 3 139 18 0 4879 37 5204 3 4879 1076 5203 45
British Columbia 7565 0 0 1 1 0 7565 79 2429 0 0 114 11 9 2429 26 2425 5 2389 597 2385 4
Yukon 1188 0 0 0 0 0 1260 2 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
Northwest Territories 122 0 0 0 0 0 112 0 24 0 0 0 0 0 24 2 24 0 112 18 24 0
Nunavut 4 0 0 0 0 0 4 0 4 0 0 0 0 0 4 0 4 0 4 2 4 0
Territories 1314 0 0 0 0 0 1376 2 28 0 0 0 0 0 28 2 28 0 116 20 28 0
CANADA 52441 1 3 7 11 1 44634 3533 20419 1 8 692 29 597 20409 218 20576 46 19353 5229 14842 95

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 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.

Influenza co-detections may cause the sum of A(H1N1)pdm09, A(H3), and A(UnS) positive results to exceed 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 0.02 0.00 2.17 1.01 1.58 0.01 0.00 0.20 0.05 0.11 8.05 0.07 1.39 0.34 0.67 8.67 0.02 3.28 1.90 2.43 1.36 0.44 2.25 1.39 1.82 0.17 0.00 0.92 0.05 0.34 27.34 16.62 41.29 33.00 35.43 0.53 0.09 1.08 0.22 0.58

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
40 312 49 6 918 15 720 3

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 10233 0.02 0.01 799 0.00 0.00 1543 0.13 0.06 2060 0.00 0.00 3731 0.00 0.00 1822 0.00 0.00 278 0.00 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 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 8943 8.05 792 0.38 1290 36.98 2016 9.42 2747 0.80 1822 1.54 276 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 3598 8.67 721 6.38 238 1.26 1544 12.37 705 5.67 386 8.29

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 3598 1.36 721 0.14 238 2.10 1544 1.94 705 1.70 386 0.26

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 3621 0.17 721 0.00 238 1.26 1505 0.20 767 0.00 386 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 3358 27.34 721 17.48 N.A. N.A. 1544 33.03 705 23.83 377 29.71

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 2838 0.53 332 0.30 238 0.00 1120 0.80 767 0.65 377 0.00

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