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Respiratory Virus Report, week 37 - ending September 18, 2021

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Organization: Public Health Agency of Canada

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Overall Summary

September 12 to September 18, 2021 (week 37)

Respiratory virus detections continue to increase in Canada

  • Enterovirus/rhinovirus (839 detections; 27.6% positive), respiratory syncytial virus (626 detections; 8.9% positive), and human parainfluenza virus (193 detections; 6.0% positive) are the most common seasonal respiratory viruses detected in Canada. Activity of these viruses has fluctuated in recent weeks.
    • Activity of enterovirus/rhinovirus is slightly below expected levels.
    • Activity of respiratory syncytial virus is above expected levels. Detections have been increasing in recent weeks. The majority of detections are found in Quebec.
    • 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.
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

The Respiratory Virus Detection Surveillance System collects data from select laboratories across Canada on the number of tests performed and the number of tests positive for influenza and other respiratory viruses. Data are reported on a weekly basis year-round to the Centre for Immunization and Respiratory Infectious Diseases (CIRID), Public Health Agency of Canada. These data are also summarized in the weekly FluWatch report.

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

Respiratory virus detections

Table 1: Respiratory virus detections for the week ending September 18, 2021 (surveillance week 2021-37)
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 731 0 0 0 0 0 731 2 731 0 0 9 0 4 733 4 731 0 731 292 N.C. N.C.
Prince Edward Island 75 0 0 0 0 0 75 0 75 0 0 17 0 0 75 1 75 0 75 26 75 1
Nova Scotia 61 0 0 0 0 0 61 1 55 0 0 1 0 0 55 0 55 0 55 4 55 0
New Brunswick 142 0 0 0 0 0 130 1 117 0 0 7 0 0 117 0 117 0 117 5 117 0
Atlantic 1009 0 0 0 0 0 997 4 978 0 0 34 0 4 980 5 978 0 978 327 247 1
Région Nord-Est 688 0 0 0 0 0 210 60 3 0 0 0 0 0 3 0 3 0 N.C. N.C. 3 0
Québec-Chaudière-Appalaches 17 0 0 0 0 0 68 9 1 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Centre-du-Québec 64 0 0 0 0 0 81 42 21 0 0 0 0 0 21 0 21 0 N.C. N.C. 14 0
Montréal-Laval   839 0 0 0 0 0 841 387 114 0 0 1 0 0 114 0 114 2 N.C. N.C. 114 0
Ouest du Québec 72 0 0 0 0 0 72 20 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Montérégie 38 0 0 0 0 0 38 16 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 1718 0 0 0 0 0 1310 534 139 0 0 1 0 0 138 0 138 2 N.C. N.C. 131 0
P.H.O.L. - Ottawa 361 0 1 0 1 0 361 60 361 0 0 0 0 50 361 11 361 2 361 148 361 4
EORLA 86 0 0 0 0 0 86 8 27 0 0 0 0 0 27 0 0 0 5 0 0 0
P.H.O.L. - Kingston 68 0 0 0 0 0 68 1 68 0 0 0 0 16 68 0 68 0 68 27 68 0
UHN / Mount Sinai Hospital 409 0 0 0 0 0 409 2 24 0 0 0 0 0 24 0 24 0 24 0 24 0
P.H.O.L. - Toronto   197 0 1 0 1 0 196 3 196 0 0 0 0 10 197 1 196 0 196 20 197 0
Sick Kids Hospital - Toronto 44 0 0 0 0 0 0 0 44 0 0 4 0 0 44 1 44 0 44 7 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 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. - 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   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. - London 22 0 0 0 0 0 22 1 22 0 0 0 0 1 22 0 22 0 22 6 22 0
P.H.O.L. - Orillia 7 0 0 0 0 0 7 0 7 0 0 0 0 1 7 0 7 0 7 7 7 0
P.H.O.L. - Thunder Bay 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. - Sudbury 14 0 0 0 0 0 14 0 14 0 0 0 0 0 14 0 14 0 14 5 14 0
P.H.O.L. - Hamilton 20 0 0 0 0 0 20 0 20 0 0 0 0 1 20 1 20 0 20 4 20 0
P.H.O.L. - Peterborough 13 0 0 0 0 0 13 0 13 0 0 0 0 1 13 0 13 0 13 2 13 0
St. Joseph's - Hamilton 269 0 0 0 0 0 269 1 269 0 0 31 0 0 269 2 269 0 269 71 0 0
Province of Ontario 1517 0 2 0 2 0 1472 76 1072 0 0 35 0 80 1073 16 1045 2 1050 297 777 4
Province of Manitoba    1524 0 0 0 0 0 1524 2 29 0 0 1 0 0 29 1 78 1 29 8 78 0
Province of Saskatchewan 66 0 0 0 0 0 61 0 69 0 0 0 1 0 69 0 69 0 69 15 68 0
Province of Alberta 1613 0 1 1 2 0 597 3 597 0 1 15 0 0 597 0 597 0 597 117 597 4
Prairies 3203 0 1 1 2 0 2182 5 695 0 1 16 1 0 695 1 744 1 695 140 743 4
British Columbia 953 0 0 0 0 0 953 7 314 0 0 15 5 1 314 4 314 0 306 72 306 1
Yukon 125 0 0 0 0 0 125 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 17 0 0 0 0 0 16 0 4 0 0 0 0 0 4 1 4 0 16 3 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 142 0 0 0 0 0 141 0 4 0 0 0 0 0 4 1 4 0 16 3 4 0
CANADA 8542 0 3 1 4 0 7055 626 3202 0 1 101 6 85 3204 27 3223 5 3045 839 2208 10

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 September 18, 2021 (surveillance week 2021-35 to 2021-37)
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 1664 0 0 0 0 0 1664 6 1664 0 0 10 0 7 1666 9 1664 0 1664 472 N.C. N.C.
Prince Edward Island 186 0 0 0 0 0 186 0 186 0 0 31 0 0 186 6 186 0 186 64 186 1
Nova Scotia 148 0 0 0 0 0 148 1 129 0 2 7 0 0 129 0 129 0 129 10 129 0
New Brunswick 311 0 0 0 0 0 283 1 232 0 0 8 0 0 225 0 232 0 232 6 232 0
Atlantic 2309 0 0 0 0 0 2281 8 2211 0 2 56 0 7 2206 15 2211 0 2211 552 547 1
Région Nord-Est 1354 0 0 0 0 0 363 107 3 0 0 0 0 0 3 0 3 0 N.C. N.C. 3 0
Québec-Chaudière-Appalaches 75 0 0 0 0 0 180 38 54 0 0 3 0 0 53 1 53 0 N.C. N.C. 53 0
Centre-du-Québec 115 0 0 0 0 0 134 57 44 0 0 6 0 0 44 0 44 0 N.C. N.C. 37 0
Montréal-Laval   2155 0 0 1 1 0 2159 943 322 1 0 4 0 0 322 12 322 6 N.C. N.C. 322 0
Ouest du Québec 141 0 0 0 0 0 141 40 3 0 0 0 0 0 0 0 3 0 N.C. N.C. 3 0
Montérégie 95 0 0 0 0 0 95 38 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 3935 0 0 1 1 0 3072 1223 426 1 0 13 0 0 422 13 425 6 N.C. N.C. 418 0
P.H.O.L. - Ottawa 930 0 1 0 1 0 930 103 930 0 0 0 0 180 930 31 930 4 930 376 930 20
EORLA 259 0 0 0 0 0 259 12 61 0 0 2 0 0 61 0 0 0 39 6 25 1
P.H.O.L. - Kingston 114 0 0 0 0 0 114 2 114 0 0 0 0 27 114 3 114 0 114 42 114 0
UHN / Mount Sinai Hospital 1157 0 0 1 1 0 1157 2 50 0 0 0 0 0 50 0 50 0 50 1 50 0
P.H.O.L. - Toronto   476 0 1 0 1 0 475 4 475 0 0 0 0 29 476 2 475 0 475 65 476 0
Sick Kids Hospital - Toronto 103 0 0 0 0 0 0 0 103 0 0 8 0 0 103 1 103 0 103 21 103 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 3 0 0 0 0 0 3 0 3 0 0 0 0 0 3 0 3 0 3 0 3 0
P.H.O.L. - Timmins 15 0 0 0 0 0 15 0 15 0 0 0 0 2 15 0 15 0 15 0 15 0
St. Joseph's - London   46 0 0 0 0 0 46 1 46 0 0 4 0 0 46 0 46 0 46 6 46 0
P.H.O.L. - London 86 0 0 0 0 0 86 1 86 0 0 0 0 2 86 0 86 0 86 15 86 0
P.H.O.L. - Orillia 32 0 0 0 0 0 32 1 32 0 0 0 0 1 32 0 32 0 32 14 32 0
P.H.O.L. - Thunder Bay 21 0 0 0 0 0 21 0 21 0 0 0 0 0 21 0 21 0 21 9 21 0
P.H.O.L. - Sudbury 31 0 0 0 0 0 31 0 31 0 0 0 0 0 31 0 31 0 31 7 31 0
P.H.O.L. - Hamilton 45 0 0 0 0 0 45 0 45 0 0 0 0 3 45 1 45 4 45 9 45 0
P.H.O.L. - Peterborough 29 0 0 0 0 0 29 0 29 0 0 0 0 2 29 0 29 0 29 5 29 0
St. Joseph's - Hamilton 699 0 0 0 0 0 693 6 693 0 0 72 0 0 693 4 693 1 693 119 0 0
Province of Ontario 4046 0 2 1 3 0 3936 132 2734 0 0 86 0 246 2735 42 2673 9 2712 695 2006 21
Manitoba    3988 0 0 0 0 0 3988 4 71 0 0 1 0 0 71 2 233 2 71 24 233 0
Province of Saskatchewan 199 0 0 0 0 0 194 1 211 0 0 1 2 0 211 2 211 0 211 49 210 0
Province of Alberta 5158 0 1 2 3 0 2101 6 2101 0 2 36 5 0 2101 7 2101 1 2101 405 2101 19
Prairies 9345 0 1 2 3 0 6283 11 2383 0 2 38 7 0 2383 11 2545 3 2383 478 2544 19
British Columbia 2908 0 0 1 1 0 2908 15 948 0 0 27 5 3 948 8 948 0 930 172 926 4
Yukon 486 0 0 0 0 0 558 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 86 0 0 0 0 0 81 0 13 0 0 0 0 0 13 2 13 0 81 10 13 0
Nunavut 2 0 0 0 0 0 2 0 2 0 0 0 0 0 2 0 2 0 2 0 2 0
Territories 574 0 0 0 0 0 641 2 15 0 0 0 0 0 15 2 15 0 83 10 15 0
CANADA 23117 0 3 5 8 0 19121 1391 8717 1 4 220 12 256 8709 91 8817 18 8319 1907 6456 45

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 7.56 0.04 1.09 0.22 0.57 4.93 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 18.66 8.13 30.69 23.30 26.31 0.62 0.00 0.38 0.12 0.22
37 2021-09-18 0.05 0.00 1.59 0.36 0.87 0.00 0.00 0.19 0.04 0.12 8.87 0.02 1.37 0.31 0.64 6.03 0.13 3.26 1.65 2.40 0.84 0.35 2.44 1.38 1.86 0.16 0.05 1.61 0.00 0.51 27.55 8.07 33.58 27.74 31.68 0.45 0.05 0.56 0.00 0.26

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
37 193 27 5 839 10 626 4

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 7679 0.01 0.00 675 0.00 0.00 1369 0.00 0.00 1224 0.08 0.00 3294 0.00 0.00 930 0.00 0.00 187 0.00 0.00
37 2021-09-18 8542 0.05 0.00 1009 0.00 0.00 1718 0.00 0.00 1517 0.13 0.00 3203 0.06 0.00 953 0.00 0.00 142 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 6340 7.56 671 0.60 1069 39.85 1187 3.12 2227 0.22 930 0.54 256 0.78
37 2021-09-18 7055 8.87 997 0.40 1310 40.76 1472 5.16 2182 0.23 953 0.73 141 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 2878 4.93 653 2.91 149 4.03 805 11.55 949 1.58 317 2.84
37 2021-09-18 3202 6.03 978 3.89 139 0.72 1072 10.73 695 2.59 314 6.69

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 2876 1.15 653 0.61 147 4.76 805 1.61 949 0.63 317 0.95
37 2021-09-18 3204 0.84 980 0.51 138 0.00 1073 1.49 695 0.14 314 1.27

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 2929 0.24 653 0.00 149 0.67 796 0.50 1009 0.20 317 0.00
37 2021-09-18 3223 0.16 978 0.00 138 1.45 1045 0.19 744 0.13 314 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 2739 18.66 653 15.62 N.A. N.A. 805 21.24 949 18.86 311 18.01
37 2021-09-18 3045 27.55 978 33.44 N.A. N.A. 1050 28.29 695 20.14 306 23.53

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 2256 0.62 202 0.00 149 0.00 584 1.03 1009 0.69 307 0.33
37 2021-09-18 2208 0.45 247 0.40 131 0.00 777 0.51 743 0.54 306 0.33

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