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Respiratory Virus Report, week 45 - ending November 13, 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 45 (October 31 to November 13, 2021):

  • Respiratory syncytial virus (1,139 detections; 7.7% positive), enterovirus/rhinovirus (775 detections; 22.5% positive), and human parainfluenza virus (349 detections; 9.3% positive) are the most common seasonal respiratory viruses detected in Canada.
    • Activity of respiratory syncytial virus remains above expected levels. Activity has decreased in Quebec in recent weeks, while activity has been either stable or slowly increasing in other parts of Canada.
    • 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.
  • 31/34 sentinel laboratories reported surveillance data.

On this page

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 November 13, 2021 (surveillance week 2021-45)
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 79 0 0 0 0 0 79 0 79 0 0 5 0 0 79 2 79 0 79 17 79 3
Nova Scotia 81 0 0 0 0 0 81 7 61 0 0 2 0 0 61 2 61 0 61 7 61 0
New Brunswick 656 0 0 0 0 0 298 0 186 0 0 1 0 0 186 0 186 0 186 1 186 0
Atlantic 816 0 0 0 0 0 458 7 326 0 0 8 0 0 326 4 326 0 326 25 326 3
Région Nord-Est 591 0 0 0 0 0 392 86 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Québec-Chaudière-Appalaches 468 0 0 0 0 0 498 90 52 0 0 1 0 0 52 2 52 0 N.C. N.C. 52 0
Centre-du-Québec 294 0 0 0 0 0 262 93 6 0 0 0 0 0 6 0 14 1 N.C. N.C. 6 0
Montréal-Laval   713 0 0 1 1 0 712 66 254 1 1 0 0 0 254 19 254 15 N.C. N.C. 254 1
Ouest du Québec 220 0 0 0 0 0 220 62 5 0 0 0 0 0 5 0 5 0 N.C. N.C. 5 0
Montérégie 155 0 0 0 0 0 155 17 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 2441 0 0 1 1 0 2239 414 317 1 1 1 0 0 317 21 325 16 N.C. N.C. 317 1
P.H.O.L. - Ottawa 414 0 0 0 0 0 414 102 414 0 0 0 0 63 414 12 414 1 414 139 414 16
EORLA 294 0 0 0 0 0 294 45 30 0 0 2 0 0 30 0 0 0 30 8 0 0
P.H.O.L. - Kingston 56 0 0 0 0 0 56 4 56 0 0 0 0 3 56 1 56 1 56 21 56 2
UHN / Mount Sinai Hospital 444 0 0 0 0 0 444 3 4 0 0 0 0 0 4 0 4 0 4 1 4 0
P.H.O.L. - Toronto   346 0 0 0 0 0 346 13 346 0 0 0 0 16 346 4 346 0 346 72 346 3
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 15 0 0 0 0 0 15 0 15 0 0 0 0 1 15 0 15 0 15 8 15 0
P.H.O.L. - Timmins 5 0 0 0 0 0 5 0 5 0 0 0 0 1 5 0 5 0 5 1 5 0
St. Joseph's - London   387 0 0 0 0 0 387 17 28 0 0 0 0 4 28 0 28 0 22 10 22 0
P.H.O.L. - London 96 0 0 0 0 0 96 7 96 0 0 0 0 12 96 4 96 0 96 22 96 3
P.H.O.L. - Orillia 33 0 1 0 1 0 33 6 33 0 0 0 0 6 33 2 33 1 33 14 33 0
P.H.O.L. - Thunder Bay 4 0 0 0 0 0 4 0 4 0 0 0 0 0 4 0 4 0 4 0 4 1
P.H.O.L. - Sudbury 2 0 0 0 0 0 2 0 2 0 0 0 0 0 2 0 2 0 2 0 2 0
P.H.O.L. - Hamilton 44 0 1 0 1 0 43 3 43 0 0 0 0 3 43 1 43 0 43 13 43 0
P.H.O.L. - Peterborough 38 0 0 0 0 0 38 1 38 0 0 0 0 0 38 0 38 0 38 4 38 0
St. Joseph's - Hamilton 594 0 0 0 0 0 594 75 594 1 0 35 0 0 594 1 594 0 594 144 0 0
Province of Ontario 2772 0 2 0 2 0 2771 276 1708 1 0 37 0 109 1708 25 1678 3 1702 457 1078 25
Province of Manitoba    2319 0 1 1 2 0 2319 23 15 0 0 6 0 0 15 0 94 0 15 9 15 0
Province of Saskatchewan 872 0 0 0 0 0 872 2 107 0 0 8 0 0 107 2 107 0 107 26 107 3
Province of Alberta 1842 0 0 0 0 0 680 41 680 0 0 53 12 0 680 6 680 2 680 126 680 50
Prairies 5033 0 1 1 2 0 3871 66 802 0 0 67 12 0 802 8 881 2 802 161 802 53
British Columbia 5053 0 0 0 7 9 5023 376 616 0 0 90 8 14 616 5 616 7 609 130 609 1
Yukon 512 0 0 0 0 1 512 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 1 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 1 0 1 1 1 0
Nunavut 2 0 0 0 0 0 1 0 1 0 0 0 0 0 1 1 1 0 1 1 1 0
Territories 515 0 0 0 0 1 514 0 2 0 0 0 0 0 2 1 2 0 2 2 2 0
CANADA 16630 0 3 2 12 10 14876 1139 3771 2 1 203 20 123 3771 64 3828 28 3441 775 3134 83

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.

Note: 14 reported influenza detections this week were known to be associated with recent live attenuated influenza vaccine (LAIV) receipt and were excluded from the data as they do not represent community transmission of seasonal influenza viruses.

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 November 13, 2021 (surveillance weeks 2021-35 to 2021-45)
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 875 0 0 0 0 0 875 2 875 0 0 140 0 0 875 14 875 0 875 262 875 19
Nova Scotia 743 0 0 0 0 0 743 14 556 0 2 31 0 0 570 5 570 0 570 57 570 1
New Brunswick 2481 0 0 0 0 0 1889 5 1459 0 0 19 0 0 1452 2 1459 0 1459 18 1368 0
Atlantic 8532 0 0 0 0 0 7940 29 7323 0 5 244 0 47 7333 33 7337 1 7337 1739 2813 20
Région Nord-Est 5720 0 0 0 0 0 3109 1100 478 0 0 6 0 0 478 11 11 0 N.C. N.C. 294 2
Québec-Chaudière-Appalaches 1788 0 0 0 0 2 2330 795 335 0 0 5 0 0 336 11 255 0 N.C. N.C. 257 2
Centre-du-Québec 1426 0 0 0 0 0 1763 852 212 0 0 9 0 0 212 4 220 1 N.C. N.C. 205 2
Montréal-Laval   7058 0 0 3 3 3 7062 2154 1973 2 1 13 0 0 1973 114 1973 57 N.C. N.C. 1973 7
Ouest du Québec 1755 0 0 0 0 0 1723 728 9 0 0 0 0 0 5 0 8 0 N.C. N.C. 8 0
Montérégie 1057 0 0 0 0 0 1057 329 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 18804 0 0 3 3 5 17044 5958 3007 2 1 33 0 0 3004 140 2467 58 N.C. N.C. 2737 13
P.H.O.L. - Ottawa 4269 1 1 0 2 0 4269 974 4269 0 0 0 0 555 4269 152 4268 17 4269 1647 4268 86
EORLA 1677 0 0 0 0 0 1652 207 289 0 0 13 0 0 289 1 1 0 289 63 25 1
P.H.O.L. - Kingston 499 0 0 0 0 0 499 20 498 0 0 0 0 116 498 7 497 2 498 198 497 9
UHN / Mount Sinai Hospital 4585 0 0 1 1 0 4585 13 152 0 0 0 0 0 152 0 152 0 152 8 152 0
P.H.O.L. - Toronto   2777 0 1 0 1 0 2775 70 2775 0 0 0 0 180 2776 18 2775 2 2775 537 2776 26
Sick Kids Hospital - Toronto 437 0 0 0 0 0 0 0 437 0 0 51 0 0 437 4 437 1 437 128 437 1
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 57 0 0 0 0 0 57 0 57 0 0 0 0 4 57 0 57 0 57 20 57 0
P.H.O.L. - Timmins 68 0 0 0 0 0 68 2 68 0 0 0 0 5 68 0 68 0 68 11 68 0
St. Joseph's - London   988 0 0 0 0 0 988 36 392 0 0 7 0 51 392 9 392 1 374 92 373 0
P.H.O.L. - London 736 0 0 0 0 0 736 21 736 0 0 0 0 102 736 13 736 1 736 219 736 5
P.H.O.L. - Orillia 213 0 1 0 1 0 213 13 213 0 0 0 0 31 213 5 211 2 213 87 211 2
P.H.O.L. - Thunder Bay 72 0 0 0 0 0 72 0 72 0 0 0 0 0 72 0 72 0 72 31 72 1
P.H.O.L. - Sudbury 132 0 0 0 0 0 132 0 132 0 0 0 0 2 132 0 132 1 132 24 132 0
P.H.O.L. - Hamilton 392 0 2 0 2 0 388 15 388 0 0 0 0 32 388 4 388 4 388 105 388 1
P.H.O.L. - Peterborough 217 0 0 0 0 0 217 7 216 0 0 0 0 7 216 1 215 0 216 41 215 2
St. Joseph's - Hamilton 4221 0 0 0 0 0 4215 253 4215 1 0 534 0 0 4215 21 4215 4 4215 866 0 0
Province of Ontario 21340 1 5 1 7 0 20866 1631 14909 1 0 605 0 1085 14910 235 14616 35 14891 4077 10407 134
Manitoba    18588 1 2 3 6 0 18588 106 278 1 1 23 0 0 278 6 926 2 278 121 732 2
Province of Saskatchewan 5153 0 0 0 0 0 5124 17 884 0 0 31 4 0 884 12 884 0 884 196 883 3
Province of Alberta 19784 0 1 2 3 0 7638 153 7638 0 3 384 40 0 7638 61 7638 8 7638 1501 7638 177
Prairies 43525 1 3 5 9 0 31350 276 8800 1 4 438 44 0 8800 79 9448 10 8800 1818 9253 182
British Columbia 24508 0 2 3 28 28 24465 959 5540 0 0 589 37 60 5540 47 5536 28 5381 1309 5431 17
Yukon 2712 0 0 0 3 6 2782 4 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 176 0 0 0 0 0 162 0 32 0 0 0 0 0 32 2 32 0 160 24 32 0
Nunavut 13 0 0 0 0 0 10 0 10 0 0 0 0 0 10 1 10 0 10 5 7 0
Territories 2901 0 0 0 3 6 2954 4 42 0 0 0 0 0 42 3 42 0 170 29 39 0
CANADA 119610 2 10 12 50 39 104619 8857 39621 4 10 1909 81 1192 39629 537 39446 132 36579 8972 30680 366

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.

Note: 16 influenza detections reported to date this season are known to be associated with recent live attenuated influenza vaccine (LAIV) receipt and were excluded from the data as they do not represent community transmission of seasonal influenza viruses.

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 8.85 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 8.85 0.07 2.16 0.55 1.32 9.58 0.07 3.98 3.18 3.56 1.21 0.37 2.42 1.63 1.96 0.39 0.02 1.64 0.12 0.57 20.02 13.14 28.73 21.67 24.95 1.05 0.00 2.35 0.27 0.75
44 2021-11-06 0.12 0.04 8.42 1.08 3.39 0.13 0.03 0.71 0.12 0.31 8.45 0.05 3.35 0.83 1.92 9.94 0.03 4.81 2.94 3.70 1.49 0.22 2.88 1.18 2.20 0.82 0.13 1.08 0.23 0.47 21.98 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 7.66 0.04 4.43 1.29 2.59 9.25 0.01 5.42 2.53 4.01 1.70 0.33 2.68 2.02 2.42 0.73 0.01 1.30 0.04 0.77 22.52 9.70 23.08 15.17 20.56 2.65 0.03 2.74 0.52 0.96

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
42 402 102 6 788 36 942 6
43 377 48 15 696 35 1,031 7
44 366 55 30 739 67 1,133 37
45 349 64 28 775 83 1,139 22

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 12275 0.03 0.02 634 0.00 0.00 2050 0.00 0.00 2269 0.04 0.00 4568 0.00 0.00 2440 0.08 0.04 314 0.32 0.32
43 2021-10-30 12910 0.03 0.02 851 0.00 0.00 2119 0.05 0.00 2143 0.00 0.00 4647 0.04 0.00 2920 0.00 0.07 230 0.43 0.43
44 2021-11-06 15015 0.12 0.13 316 0.00 0.00 2323 0.00 0.00 2473 0.00 0.00 5030 0.00 0.00 4625 0.37 0.35 248 0.40 1.21
45 2021-11-13 16630 0.07 0.06 816 0.00 0.00 2441 0.04 0.00 2772 0.07 0.00 5033 0.04 0.00 5053 0.14 0.18 515 0.00 0.19

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 10649 8.85 581 0.17 1845 33.88 2199 9.55 3272 1.04 2440 2.95 312 0.00
43 2021-10-30 11646 8.85 730 0.14 2121 31.02 2105 9.88 3541 1.04 2920 4.35 229 0.00
44 2021-11-06 13415 8.45 303 2.31 2048 26.46 2421 10.45 3787 1.69 4612 5.77 244 0.41
45 2021-11-13 14876 7.66 458 1.53 2239 18.49 2771 9.96 3871 1.70 5023 7.49 514 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 4017 10.01 628 5.41 454 0.44 1631 11.77 769 8.19 531 20.90
43 2021-10-30 3935 9.58 587 1.70 414 0.97 1541 11.29 778 8.10 608 20.72
44 2021-11-06 3681 9.94 154 3.90 293 0.34 1690 10.00 835 8.26 708 17.09
45 2021-11-13 3771 9.25 326 2.45 317 0.95 1708 8.61 802 9.85 616 18.18

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 4018 2.54 628 0.00 455 11.87 1631 2.33 769 0.91 531 0.56
43 2021-10-30 3952 1.21 601 0.17 417 3.12 1541 1.56 778 1.03 608 0.33
44 2021-11-06 3681 1.49 154 1.95 293 1.02 1690 1.60 835 1.44 708 1.41
45 2021-11-13 3771 1.70 326 1.23 317 6.62 1708 1.46 802 1.00 616 0.81

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 3877 0.15 628 0.00 276 0.36 1611 0.12 827 0.00 531 0.56
43 2021-10-30 3880 0.39 601 0.00 313 3.51 1510 0.13 841 0.24 608 0.00
44 2021-11-06 3642 0.82 154 0.00 210 6.19 1663 0.24 906 0.33 708 1.41
45 2021-11-13 3828 0.73 326 0.00 325 4.92 1678 0.18 881 0.23 616 1.14

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 3555 22.17 628 11.78 N.A. N.A. 1631 25.32 769 21.98 515 25.05
43 2021-10-30 3477 20.02 601 4.33 N.A. N.A. 1540 24.68 778 19.15 539 25.97
44 2021-11-06 3362 21.98 154 19.48 N.A. N.A. 1675 23.28 835 17.96 689 24.38
45 2021-11-13 3441 22.52 326 7.67 N.A. N.A. 1702 26.85 802 20.07 609 21.35

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 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 3134 2.65 326 0.92 317 0.32 1078 2.32 802 6.61 609 0.16

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