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Respiratory Virus Report, week 44 - ending November 6, 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 44 (October 31 to November 6, 2021):

  • Respiratory syncytial virus (1,107 detections; 8.3% positive), enterovirus/rhinovirus (679 detections; 21.6% positive), and human parainfluenza virus (323 detections; 9.4% positive) are the most common seasonal respiratory viruses detected in Canada.
    • Activity of respiratory syncytial virus remains above expected levels. Detections have been high in Quebec and Eastern Ontario, but are starting to increase in other parts of the country such as British Columbia.
    • 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.
  • 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 November 6, 2021 (surveillance week 2021-44)
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 75 0 0 0 0 0 75 2 75 0 0 3 0 0 75 2 75 0 75 25 75 6
Nova Scotia 76 0 0 0 0 0 76 3 55 0 0 3 0 0 55 0 55 0 55 2 55 0
New Brunswick 165 0 0 0 0 0 152 2 24 0 0 0 0 0 24 1 24 0 24 3 24 0
Atlantic 316 0 0 0 0 0 303 7 154 0 0 6 0 0 154 3 154 0 154 30 154 6
Région Nord-Est 675 0 0 0 0 0 377 120 83 0 0 1 0 0 83 1 0 0 N.C. N.C. 0 0
Québec-Chaudière-Appalaches 450 0 0 0 0 0 469 117 44 0 0 0 0 0 44 1 44 0 N.C. N.C. 44 1
Centre-du-Québec 242 0 0 0 0 0 246 115 25 0 0 0 0 0 25 0 25 0 N.C. N.C. 25 2
Montréal-Laval 600 0 0 0 0 0 600 81 141 0 0 0 0 0 141 1 141 13 N.C. N.C. 141 2
Ouest du Québec 219 0 0 0 0 0 219 85 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Montérégie 137 0 0 0 0 0 137 24 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 2323 0 0 0 0 0 2048 542 293 0 0 1 0 0 293 3 210 13 N.C. N.C. 210 5
P.H.O.L. - Ottawa 414 0 0 0 0 0 414 126 414 0 0 0 0 51 414 18 414 2 414 120 414 12
EORLA 203 0 0 0 0 0 203 30 27 0 0 2 0 0 27 0 0 0 27 4 0 0
P.H.O.L. - Kingston 38 0 0 0 0 0 38 4 38 0 0 0 0 8 38 0 38 0 38 13 38 0
UHN / Mount Sinai Hospital 429 0 0 0 0 0 429 4 10 0 0 0 0 0 10 0 10 0 10 0 10 0
P.H.O.L. - Toronto 268 0 0 0 0 0 267 7 267 0 0 0 0 14 267 1 267 0 267 48 267 2
Sick Kids Hospital - Toronto 51 0 0 0 0 0 0 0 51 0 0 6 0 0 51 1 51 0 51 13 51 1
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 7 0 0 0 0 0 7 0 7 0 0 0 0 2 7 0 7 0 7 0 7 0
P.H.O.L. - Timmins 5 0 0 0 0 0 5 0 5 0 0 0 0 0 5 0 5 0 5 0 5 0
St. Joseph's - London 250 0 0 0 0 0 250 2 63 0 0 0 0 6 63 1 63 0 48 9 48 0
P.H.O.L. - London 90 0 0 0 0 0 90 6 90 0 0 0 0 10 90 2 90 1 90 32 90 0
P.H.O.L. - Orillia 38 0 0 0 0 0 38 2 38 0 0 0 0 7 38 0 38 0 38 22 38 2
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 1 4 0
P.H.O.L. - Sudbury 6 0 0 0 0 0 6 0 6 0 0 0 0 0 6 0 6 0 6 2 6 0
P.H.O.L. - Hamilton 52 0 0 0 0 0 52 7 52 0 0 0 0 2 52 0 52 0 52 4 52 1
P.H.O.L. - Peterborough 39 0 0 0 0 0 39 0 39 0 0 0 0 2 39 0 39 0 39 8 39 2
St. Joseph's - Hamilton 579 0 0 0 0 0 579 65 579 0 0 59 0 0 579 4 579 1 579 114 0 0
Province of Ontario 2473 0 0 0 0 0 2421 253 1690 0 0 67 0 102 1690 27 1663 4 1675 390 1069 20
Province of Manitoba 1946 0 0 0 0 0 1946 33 28 0 0 6 0 0 28 1 99 0 28 11 99 0
Province of Saskatchewan 1029 0 0 0 0 0 1029 1 79 0 0 7 1 0 79 1 79 0 79 15 79 0
Province of Alberta 1853 0 0 0 0 0 669 28 669 0 0 48 0 0 669 8 669 3 669 107 669 31
Prairies 4828 0 0 0 0 0 3644 62 776 0 0 61 1 0 776 10 847 3 776 133 847 31
British Columbia 4624 0 1 1 17 16 4611 242 541 0 0 73 4 8 541 7 541 1 522 125 522 0
Yukon 234 0 0 0 1 3 234 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 12 0 0 0 0 0 10 0 1 0 0 0 0 0 1 0 1 0 9 1 1 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 246 0 0 0 1 3 244 1 1 0 0 0 0 0 1 0 1 0 9 1 1 0
CANADA 14810 0 1 1 18 19 13271 1107 3455 0 0 208 5 110 3455 50 3416 21 3136 679 2803 62

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: Two 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 6, 2021 (surveillance weeks 2021-35 to 2021-44)
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 796 0 0 0 0 0 796 2 796 0 0 135 0 0 796 12 796 0 796 245 796 16
Nova Scotia 662 0 0 0 0 0 662 7 495 0 2 29 0 0 509 3 509 0 509 50 509 1
New Brunswick 1825 0 0 0 0 0 1591 5 1273 0 0 18 0 0 1266 2 1273 0 1273 17 1182 0
Atlantic 7716 0 0 0 0 0 7482 22 6997 0 5 236 0 47 7007 29 7011 1 7011 1714 2487 17
Région Nord-Est 5129 0 0 0 0 0 2717 1014 478 0 0 6 0 0 478 11 11 0 N.C. N.C. 294 2
Québec-Chaudière-Appalaches 1320 0 0 0 0 2 1832 705 283 0 0 4 0 0 284 9 203 0 N.C. N.C. 205 2
Centre-du-Québec 1132 0 0 0 0 0 1501 759 206 0 0 9 0 0 206 4 206 0 N.C. N.C. 199 2
Montréal-Laval 6345 0 0 2 2 3 6350 2088 1719 1 0 13 0 0 1719 95 1719 42 N.C. N.C. 1719 6
Ouest du Québec 1535 0 0 0 0 0 1503 666 4 0 0 0 0 0 0 0 3 0 N.C. N.C. 3 0
Montérégie 902 0 0 0 0 0 902 312 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 16363 0 0 2 2 5 14805 5544 2690 1 0 32 0 0 2687 119 2142 42 N.C. N.C. 2420 12
P.H.O.L. - Ottawa 3855 1 1 0 2 0 3855 872 3855 0 0 0 0 492 3855 140 3854 16 3855 1508 3854 70
EORLA 1383 0 0 0 0 0 1358 162 259 0 0 11 0 0 259 1 1 0 259 55 25 1
P.H.O.L. - Kingston 443 0 0 0 0 0 443 16 442 0 0 0 0 113 442 6 441 1 442 177 441 7
UHN / Mount Sinai Hospital 4141 0 0 1 1 0 4141 10 148 0 0 0 0 0 148 0 148 0 148 7 148 0
P.H.O.L. - Toronto 2431 0 1 0 1 0 2429 57 2429 0 0 0 0 164 2430 14 2429 2 2429 465 2430 23
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 42 0 0 0 0 0 42 0 42 0 0 0 0 3 42 0 42 0 42 12 42 0
P.H.O.L. - Timmins 63 0 0 0 0 0 63 2 63 0 0 0 0 4 63 0 63 0 63 10 63 0
St. Joseph's - London 601 0 0 0 0 0 601 19 364 0 0 7 0 47 364 9 364 1 352 82 351 0
P.H.O.L. - London 640 0 0 0 0 0 640 14 640 0 0 0 0 90 640 9 640 1 640 197 640 2
P.H.O.L. - Orillia 180 0 0 0 0 0 180 7 180 0 0 0 0 25 180 3 178 1 180 73 178 2
P.H.O.L. - Thunder Bay 68 0 0 0 0 0 68 0 68 0 0 0 0 0 68 0 68 0 68 31 68 0
P.H.O.L. - Sudbury 130 0 0 0 0 0 130 0 130 0 0 0 0 2 130 0 130 1 130 24 130 0
P.H.O.L. - Hamilton 347 0 1 0 1 0 344 12 344 0 0 0 0 29 344 3 344 4 344 90 344 1
P.H.O.L. - Peterborough 179 0 0 0 0 0 179 6 178 0 0 0 0 7 178 1 177 0 178 37 177 2
St. Joseph's - Hamilton 3627 0 0 0 0 0 3621 178 3621 0 0 499 0 0 3621 20 3621 4 3621 722 0 0
Province of Ontario 18567 1 3 1 5 0 18094 1355 13200 0 0 568 0 976 13201 210 12937 32 13188 3618 9328 109
Manitoba 16269 1 1 2 4 0 16269 83 263 1 1 17 0 0 263 6 832 2 263 112 717 2
Province of Saskatchewan 4196 0 0 0 0 0 4167 15 777 0 0 23 4 0 777 10 777 0 777 170 776 0
Province of Alberta 17824 0 1 2 3 0 6899 110 6899 0 3 327 25 0 6899 53 6899 6 6899 1358 6899 125
Prairies 38289 1 2 4 7 0 27335 208 7939 1 4 367 29 0 7939 69 8508 8 7939 1640 8392 127
British Columbia 19454 0 2 3 21 19 19441 559 4757 0 0 463 29 46 4757 39 4753 12 4605 1136 4655 13
Yukon 2198 0 0 0 3 5 2270 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 175 0 0 0 0 0 161 0 31 0 0 0 0 0 31 2 31 0 159 23 31 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 2384 0 0 0 3 5 2440 4 40 0 0 0 0 0 40 2 40 0 168 27 37 0
CANADA 102773 2 7 10 38 29 89597 7692 35623 2 9 1666 58 1069 35631 468 35391 95 32911 8135 27319 278

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: Two 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 19.97 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 8.34 0.05 3.35 0.83 1.92 9.35 0.03 4.81 2.94 3.70 1.45 0.22 2.88 1.18 2.20 0.61 0.13 1.08 0.23 0.47 21.65 9.23 23.82 16.75 21.34 2.21 0.00 2.59 0.21 0.88

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 15 694 35 1,031 7
44 323 50 21 679 62 1,107 37

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 12908 0.03 0.02 851 0.00 0.00 2119 0.05 0.00 2142 0.00 0.00 4646 0.04 0.00 2920 0.00 0.07 230 0.43 0.43
44 2021-11-06 14810 0.12 0.13 316 0.00 0.00 2323 0.00 0.00 2473 0.00 0.00 4828 0.00 0.00 4624 0.37 0.35 246 0.41 1.22

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 11644 8.85 730 0.14 2121 31.02 2104 9.89 3540 1.05 2920 4.35 229 0.00
44 2021-11-06 13271 8.34 303 2.31 2048 26.46 2421 10.45 3644 1.70 4611 5.25 244 0.41

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 3934 9.58 587 1.70 414 0.97 1540 11.30 778 8.10 608 20.72
44 2021-11-06 3455 9.35 154 3.90 293 0.34 1690 10.00 776 7.99 541 15.71

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 3951 1.21 601 0.17 417 3.12 1540 1.56 778 1.03 608 0.33
44 2021-11-06 3455 1.45 154 1.95 293 1.02 1690 1.60 776 1.29 541 1.29

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 3879 0.39 601 0.00 313 3.51 1509 0.13 841 0.24 608 0.00
44 2021-11-06 3416 0.61 154 0.00 210 6.19 1663 0.24 847 0.35 541 0.18

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 3476 19.97 601 4.33 N.A. N.A. 1539 24.56 778 19.15 539 25.97
44 2021-11-06 3136 21.65 154 19.48 N.A. N.A. 1675 23.28 776 17.14 522 23.95

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 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 3331 1.05 601 0.67 313 0.64 1041 1.34 778 1.80 593 0.17
44 2021-11-06 2803 2.21 154 3.90 210 2.38 1069 1.87 847 3.66 522 0.00

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