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Respiratory Virus Report, week 41 - ending October 16, 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 41 (October 10 to October 16, 2021):

  • Respiratory syncytial virus (931 detections; 10.5% positive), enterovirus/rhinovirus (716 detections; 23.4% positive), and human parainfluenza virus (353 detections; 10.4% 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 decreasing and remains near expected levels for this time of year.
    • Activity of human parainfluenza virus is increasing and remains well 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 16, 2021 (surveillance week 2021-41)
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 293 0 0 0 0 0 293 0 293 0 0 13 0 0 293 0 293 1 293 43 N.C. N.C.
Prince Edward Island 119 0 0 0 0 0 119 0 119 0 0 21 0 0 119 0 119 0 119 35 119 4
Nova Scotia 82 0 0 0 0 0 82 1 53 0 0 1 0 0 53 1 53 0 53 8 53 0
New Brunswick 120 0 0 0 0 0 114 0 78 0 0 0 0 0 78 0 78 0 78 2 78 0
Atlantic 614 0 0 0 0 0 608 1 543 0 0 35 0 0 543 1 543 1 543 88 250 4
Région Nord-Est 469 0 0 0 0 0 276 146 107 0 0 3 0 0 107 7 1 0 N.C. N.C. 107 1
Québec-Chaudière-Appalaches 183 0 0 0 0 1 246 162 39 0 0 0 0 0 39 3 39 0 N.C. N.C. 39 0
Centre-du-Québec 122 0 0 0 0 0 221 111 48 0 0 0 0 0 48 3 48 0 N.C. N.C. 48 0
Montréal-Laval 523 0 0 0 0 2 526 141 141 0 0 0 0 0 141 4 141 2 N.C. N.C. 141 2
Ouest du Québec 276 0 0 0 0 0 276 120 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Montérégie 131 0 0 0 0 0 131 37 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 1704 0 0 0 0 3 1676 717 335 0 0 3 0 0 335 17 229 2 N.C. N.C. 335 3
P.H.O.L. - Ottawa 340 0 0 0 0 0 340 103 340 0 0 0 0 38 340 13 340 0 340 120 340 3
EORLA 172 0 0 0 0 0 147 29 25 0 0 1 0 0 25 0 0 0 25 5 0 0
P.H.O.L. - Kingston 46 0 0 0 0 0 46 0 46 0 0 0 0 10 46 0 46 0 46 14 46 6
UHN / Mount Sinai Hospital 361 0 0 0 0 0 361 1 21 0 0 0 0 0 21 0 21 0 21 2 21 0
P.H.O.L. - Toronto 310 0 0 0 0 0 310 8 310 0 0 0 0 21 310 3 310 0 310 65 310 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 4 0 0 0 0 0 4 0 4 0 0 0 0 0 4 0 4 0 4 1 4 0
P.H.O.L. - Timmins 6 0 0 0 0 0 6 0 6 0 0 0 0 0 6 0 6 0 6 2 6 0
St. Joseph's - London 42 0 0 0 0 0 42 1 41 0 0 0 0 11 41 3 41 0 41 13 41 0
P.H.O.L. - London 78 0 0 0 0 0 78 0 78 0 0 0 0 16 78 1 78 0 78 31 78 0
P.H.O.L. - Orillia 22 0 0 0 0 0 22 0 22 0 0 0 0 5 22 0 22 0 22 9 22 0
P.H.O.L. - Thunder Bay 16 0 0 0 0 0 16 0 16 0 0 0 0 0 16 0 16 0 16 11 16 0
P.H.O.L. - Sudbury 14 0 0 0 0 0 14 0 14 0 0 0 0 0 14 0 14 0 14 0 14 0
P.H.O.L. - Hamilton 45 0 1 0 1 0 44 0 44 0 0 0 0 3 44 0 44 0 44 12 44 0
P.H.O.L. - Peterborough 33 0 0 0 0 0 33 1 33 0 0 0 0 1 33 1 33 0 33 9 33 0
St. Joseph's - Hamilton 404 0 0 0 0 0 404 13 404 0 0 83 0 0 404 2 404 1 404 83 0 0
Province of Ontario 1893 0 1 0 1 0 1867 156 1404 0 0 84 0 105 1404 23 1379 1 1404 377 975 16
Province of Manitoba 1687 0 0 1 1 0 1687 7 30 0 0 0 0 0 30 1 82 0 30 5 82 0
Province of Saskatchewan 285 0 0 0 0 0 285 0 74 0 0 2 0 0 74 0 74 0 74 12 74 0
Province of Alberta 1484 0 0 0 0 0 561 11 561 0 0 40 2 0 561 4 561 0 561 87 561 21
Prairies 3456 0 0 1 1 0 2533 18 665 0 0 42 2 0 665 5 717 0 665 104 717 21
British Columbia 1890 0 0 1 1 0 1890 38 448 0 0 67 7 8 448 1 448 3 440 145 440 4
Yukon 263 0 0 0 0 0 263 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 13 0 0 0 0 0 13 0 0 0 0 0 0 0 0 0 0 0 12 2 0 0
Nunavut 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Territories 277 0 0 0 0 0 276 1 0 0 0 0 0 0 0 0 0 0 12 2 0 0
CANADA 9834 0 1 2 3 3 8850 931 3395 0 0 231 9 113 3395 47 3316 7 3064 716 2717 48

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 16, 2021 (surveillance weeks 2021-35 to 2021-41)
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 4158 0 0 0 0 0 4158 8 4158 0 3 45 0 41 4161 12 4158 1 4158 1356 N.C. N.C.
Prince Edward Island 546 0 0 0 0 0 546 0 546 0 0 113 0 0 546 10 546 0 546 173 546 6
Nova Scotia 426 0 0 0 0 0 426 3 336 0 2 19 0 0 336 3 336 0 336 41 336 0
New Brunswick 785 0 0 0 0 0 738 2 588 0 0 15 0 0 581 0 588 0 588 14 497 0
Atlantic 5915 0 0 0 0 0 5868 13 5628 0 5 192 0 41 5624 25 5628 1 5628 1584 1379 6
Région Nord-Est 3114 0 0 0 0 0 1388 572 114 0 0 3 0 0 114 7 8 0 N.C. N.C. 114 1
Québec-Chaudière-Appalaches 375 0 0 0 0 2 787 353 172 0 0 4 0 0 168 5 92 0 N.C. N.C. 94 0
Centre-du-Québec 580 0 0 0 0 0 808 425 147 0 0 9 0 0 147 4 147 0 N.C. N.C. 140 0
Montréal-Laval 4481 0 0 1 1 3 4486 1769 1093 1 0 9 0 0 1093 33 1093 17 N.C. N.C. 1093 3
Ouest du Québec 831 0 0 0 0 0 832 375 3 0 0 0 0 0 0 0 3 0 N.C. N.C. 3 0
Montérégie 490 0 0 0 0 0 490 225 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 9871 0 0 1 1 5 8791 3719 1529 1 0 25 0 0 1522 49 1343 17 N.C. N.C. 1444 4
P.H.O.L. - Ottawa 2547 0 1 0 1 0 2547 493 2547 0 0 0 0 353 2547 83 2546 11 2547 1087 2546 40
EORLA 817 0 0 0 0 0 792 84 181 0 0 6 0 0 181 0 1 0 181 39 25 1
P.H.O.L. - Kingston 330 0 0 0 0 0 330 9 329 0 0 0 0 84 329 5 328 1 329 135 328 7
UHN / Mount Sinai Hospital 2812 0 0 1 1 0 2812 6 115 0 0 0 0 0 115 0 115 0 115 5 115 0
P.H.O.L. - Toronto 1533 0 1 0 1 0 1532 20 1532 0 0 0 0 107 1533 11 1532 2 1532 277 1533 11
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 18 0 0 0 0 0 18 0 18 0 0 0 0 0 18 0 18 0 18 7 18 0
P.H.O.L. - Timmins 51 0 0 0 0 0 51 2 51 0 0 0 0 3 51 0 51 0 51 9 51 0
St. Joseph's - London 234 0 0 0 0 0 234 7 233 0 0 7 0 29 233 5 233 1 237 55 236 0
P.H.O.L. - London 346 0 0 0 0 0 346 3 346 0 0 0 0 43 346 3 346 0 346 103 346 0
P.H.O.L. - Orillia 92 0 0 0 0 0 92 1 92 0 0 0 0 13 92 1 90 1 92 34 90 0
P.H.O.L. - Thunder Bay 56 0 0 0 0 0 56 0 56 0 0 0 0 0 56 0 56 0 56 27 56 0
P.H.O.L. - Sudbury 106 0 0 0 0 0 106 0 106 0 0 0 0 1 106 0 106 0 106 21 106 0
P.H.O.L. - Hamilton 192 0 1 0 1 0 190 1 190 0 0 0 0 15 190 2 190 4 190 60 190 0
P.H.O.L. - Peterborough 100 0 0 0 0 0 100 3 100 0 0 0 0 4 100 1 99 0 100 22 99 0
St. Joseph's - Hamilton 2170 0 0 0 0 0 2164 55 2164 0 0 315 0 0 2164 9 2164 3 2164 476 0 0
Province of Ontario 11626 0 3 1 4 0 11370 684 8282 0 0 345 0 652 8283 121 8097 24 8286 2416 5961 59
Manitoba 10892 1 0 1 2 0 10892 26 187 0 0 8 0 0 187 3 564 2 187 79 564 1
Province of Saskatchewan 1105 0 0 0 0 0 1077 2 561 0 0 13 2 0 561 8 561 0 561 134 560 0
Province of Alberta 12075 0 1 2 3 0 4807 46 4807 0 3 160 18 0 4807 31 4807 1 4807 970 4807 66
Prairies 24072 1 1 3 5 0 16776 74 5555 0 3 181 20 0 5555 42 5932 3 5555 1183 5931 67
British Columbia 9456 0 0 2 2 0 9456 118 3015 0 0 181 18 17 3015 27 3011 8 2967 742 2963 9
Yukon 1454 0 0 0 0 0 1526 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 135 0 0 0 0 0 125 0 24 0 0 0 0 0 24 2 24 0 124 20 24 0
Nunavut 5 0 0 0 0 0 4 0 4 0 0 0 0 0 4 0 4 0 4 2 4 0
Territories 1594 0 0 0 0 0 1655 3 28 0 0 0 0 0 28 2 28 0 128 22 28 0
CANADA 62534 1 4 7 12 5 53916 4611 24037 1 8 924 38 710 24027 266 24039 53 22564 5947 17706 145

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 0.00 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 26.25 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 10.52 0.10 1.74 0.58 0.98 10.40 0.06 3.70 1.94 2.74 1.38 0.37 1.91 1.28 1.70 0.21 0.19 0.95 0.04 0.46 23.37 15.48 33.62 26.94 29.81 1.77 0.02 0.70 0.00 0.33

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
41 353 47 7 716 48 931 6

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 10492 0.00 0.02 799 0.00 0.00 1641 0.00 0.12 2059 0.00 0.00 3889 0.00 0.00 1823 0.00 0.00 281 0.00 0.00
41 2021-10-16 9834 0.03 0.03 614 0.00 0.00 1704 0.00 0.18 1893 0.05 0.00 3456 0.03 0.00 1890 0.05 0.00 277 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 9375 9.25 792 0.38 1583 39.36 2015 9.43 2883 0.76 1823 1.59 279 0.00
41 2021-10-16 8850 10.52 608 0.16 1676 42.78 1867 8.36 2533 0.71 1890 2.01 276 0.36

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 3821 8.19 721 6.38 314 1.27 1542 12.39 716 5.59 524 6.11
41 2021-10-16 3395 10.40 543 6.45 335 0.90 1404 13.46 665 6.62 448 18.30

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 3821 1.31 721 0.14 314 1.91 1542 1.95 716 1.68 524 0.19
41 2021-10-16 3395 1.38 543 0.18 335 5.07 1404 1.64 665 0.75 448 0.22

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 3768 0.16 721 0.00 238 1.26 1503 0.20 778 0.00 524 0.00
41 2021-10-16 3316 0.21 543 0.18 229 0.87 1379 0.07 717 0.00 448 0.67

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 3505 26.25 721 17.48 N.A. N.A. 1542 33.01 716 23.88 515 21.75
41 2021-10-16 3064 23.37 543 16.21 N.A. N.A. 1404 26.85 665 15.64 440 32.95

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 2985 0.57 332 0.30 238 0.00 1118 0.81 778 0.77 515 0.19
41 2021-10-16 2717 1.77 250 1.60 335 0.90 975 1.64 717 2.93 440 0.91

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