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Respiratory Virus Report, week 47 - ending November 27, 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 47 (November 21 to November 27, 2021), activity of almost all respiratory viruses are within expected levels for this time of year.

  • Respiratory syncytial virus (1,223 detections; 8.5% positive), enterovirus/rhinovirus (721 detections; 18.1% positive), and human parainfluenza virus (301 detections; 6.7% positive) are the most common seasonal respiratory viruses detected in Canada.
    • Activity of respiratory syncytial virus is now within 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 has decreased and is now within 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 27, 2021 (surveillance week 2021-47)
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 270 0 0 0 0 0 270 2 270 0 0 2 0 14 271 0 270 2 270 37 N.C. N.C.
Prince Edward Island 79 0 0 0 0 0 79 5 79 0 0 2 0 0 79 3 79 0 79 20 79 10
Nova Scotia 859 0 0 1 1 1 859 19 99 0 0 6 0 0 99 0 99 0 99 6 99 1
New Brunswick 834 0 0 0 0 0 399 17 127 0 0 1 0 0 127 1 127 1 127 5 127 0
Atlantic 2042 0 0 1 1 1 1607 43 575 0 0 11 0 14 576 4 575 3 575 68 305 11
Région Nord-Est 712 0 0 0 0 0 288 70 97 0 0 0 1 0 2 0 2 0 N.C. N.C. 97 1
Québec-Chaudière-Appalaches 344 0 0 0 0 1 345 45 48 0 0 0 0 0 48 4 48 2 N.C. N.C. 48 2
Centre-du-Québec 349 0 0 1 1 0 321 47 21 0 0 0 0 0 21 2 21 0 N.C. N.C. 21 0
Montréal-Laval   870 0 0 2 2 0 869 43 309 0 0 2 1 0 309 8 309 31 N.C. N.C. 309 4
Ouest du Québec 224 0 0 0 0 0 224 28 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Montérégie 85 0 0 0 0 0 85 5 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 2584 0 0 3 3 1 2132 238 475 0 0 2 2 0 380 14 380 33 N.C. N.C. 475 7
P.H.O.L. - Ottawa 384 0 0 0 0 0 384 88 384 0 0 0 0 43 384 28 384 4 384 131 384 16
EORLA 281 0 0 0 0 0 281 61 28 0 0 0 0 0 28 0 28 0 28 7 0 0
P.H.O.L. - Kingston 79 0 0 0 0 0 79 11 79 0 0 0 0 4 79 3 79 0 79 19 79 8
UHN / Mount Sinai Hospital 488 0 0 1 1 0 488 5 10 0 0 0 0 0 10 0 10 0 10 0 10 0
P.H.O.L. - Toronto   434 0 2 0 2 0 431 22 431 0 0 0 0 23 431 9 431 2 431 55 431 15
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 26 0 1 0 1 0 24 0 24 0 0 0 0 0 24 0 24 0 24 7 24 0
P.H.O.L. - Timmins 17 0 0 0 0 0 17 0 17 0 0 0 0 1 17 0 17 0 17 0 17 0
St. Joseph's - London   310 0 0 0 0 0 310 22 32 0 0 0 0 1 32 1 32 0 15 2 15 0
P.H.O.L. - London 137 0 0 0 0 0 137 32 137 0 0 0 0 8 137 1 137 0 137 33 137 3
P.H.O.L. - Orillia 35 0 0 0 0 0 35 3 35 0 0 0 0 2 35 3 35 1 35 9 35 0
P.H.O.L. - Thunder Bay 11 0 0 0 0 0 11 0 11 0 0 0 0 6 11 0 11 0 11 2 11 0
P.H.O.L. - Sudbury 5 0 0 0 0 0 5 1 5 0 0 0 0 0 5 0 5 0 5 0 5 2
P.H.O.L. - Hamilton 49 0 3 0 3 0 46 2 46 0 0 0 0 2 46 0 46 0 46 14 46 2
P.H.O.L. - Peterborough 52 0 0 0 0 0 52 13 52 0 0 0 0 0 52 0 52 0 52 13 52 2
St. Joseph's - Hamilton 606 0 2 0 2 0 606 136 606 0 0 23 0 0 606 8 606 2 606 109 0 0
Province of Ontario 2914 0 8 1 9 0 2906 396 1897 0 0 23 0 90 1897 53 1897 9 1880 401 1246 48
Province of Manitoba    1829 0 0 0 0 0 1829 17 34 0 0 3 0 0 34 0 81 0 34 6 34 0
Province of Saskatchewan 746 0 0 0 0 0 746 1 145 0 0 14 2 0 145 1 145 0 145 12 145 2
Province of Alberta 2093 0 0 0 0 0 820 105 820 0 1 48 6 0 820 7 820 0 820 144 820 67
Prairies 4668 0 0 0 0 0 3395 123 999 0 1 65 8 0 999 8 1046 0 999 162 999 69
British Columbia 4195 0 0 0 14 10 4155 423 540 0 0 66 5 14 540 9 540 2 525 89 525 6
Yukon 89 0 0 0 0 0 89 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 14 0 0 0 0 0 12 0 2 0 0 0 0 0 2 0 2 0 12 1 2 0
Nunavut 145 0 0 0 0 0 145 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.
Territories 248 0 0 0 0 0 246 0 2 0 0 0 0 0 2 0 2 0 12 1 2 0
CANADA 16651 0 8 5 27 12 14441 1223 4488 0 1 167 15 118 4394 88 4440 47 3991 721 3552 141

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) and Northwest Territories (NT) are sent to reference laboratories in other provinces and reported results reflect specimens identified as originating from YT or NT.

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 27, 2021 (surveillance weeks 2021-35 to 2021-47)
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 5866 0 0 0 0 0 5865 11 5868 1 3 109 0 119 5870 14 5865 5 5869 1615 N.C. N.C.
Prince Edward Island 1042 0 0 0 0 0 1042 9 1042 0 0 147 0 0 1042 20 1042 0 1042 312 1042 37
Nova Scotia 2147 0 0 1 1 1 2147 46 739 0 2 37 0 0 753 5 753 0 753 73 753 3
New Brunswick 4220 0 0 0 0 0 2627 38 1724 0 0 20 0 0 1717 3 1724 1 1724 25 1633 0
Atlantic 13275 0 0 1 1 1 11681 104 9373 1 5 313 0 119 9382 42 9384 6 9388 2025 3428 40
Région Nord-Est 6882 0 0 0 0 0 3637 1202 579 0 0 6 1 0 484 11 17 0 N.C. N.C. 395 3
Québec-Chaudière-Appalaches 2474 0 0 0 0 3 3047 893 432 0 0 5 1 0 440 16 352 2 N.C. N.C. 354 5
Centre-du-Québec 2111 0 0 1 1 1 2403 970 262 0 0 9 0 0 262 6 270 4 N.C. N.C. 255 3
Montréal-Laval   8691 0 0 5 5 3 8694 2246 2549 2 1 16 1 0 2549 147 2549 113 N.C. N.C. 2549 12
Ouest du Québec 2210 0 0 0 0 0 2178 807 9 0 0 0 0 0 5 0 8 0 N.C. N.C. 8 0
Montérégie 1281 0 0 0 0 0 1281 341 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 23649 0 0 6 6 7 21240 6459 3831 2 1 36 3 0 3740 180 3196 119 N.C. N.C. 3561 23
P.H.O.L. - Ottawa 5018 1 1 0 2 0 5018 1173 5018 0 0 0 0 644 5018 201 5017 21 5018 1888 5017 122
EORLA 2227 0 0 0 0 0 2202 318 348 0 0 13 0 0 348 2 29 0 348 76 25 1
P.H.O.L. - Kingston 650 0 0 0 0 0 650 40 649 0 0 0 0 124 649 12 648 2 649 235 648 20
UHN / Mount Sinai Hospital 5432 0 0 3 3 0 5432 24 178 0 0 0 0 0 178 0 178 0 178 8 178 0
P.H.O.L. - Toronto   3454 0 6 0 6 0 3449 101 3449 0 0 0 0 219 3450 30 3449 4 3449 632 3450 45
Sick Kids Hospital - Toronto 567 0 0 0 0 0 0 0 567 0 0 61 0 0 567 7 567 1 567 170 567 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 96 0 1 0 1 0 94 0 94 0 0 0 0 5 94 0 94 0 94 30 94 0
P.H.O.L. - Timmins 93 0 0 0 0 0 93 2 93 0 0 0 0 7 93 1 93 0 93 14 93 0
St. Joseph's - London   1642 0 0 0 0 0 1641 82 465 0 0 7 0 56 465 11 465 1 430 108 429 1
P.H.O.L. - London 984 0 0 0 0 0 984 69 984 0 0 0 0 118 984 15 984 1 984 283 984 8
P.H.O.L. - Orillia 286 0 1 0 1 0 286 21 286 0 0 0 0 34 286 8 284 3 286 111 284 2
P.H.O.L. - Thunder Bay 85 0 0 0 0 0 85 0 85 0 0 0 0 6 85 0 85 0 85 33 85 1
P.H.O.L. - Sudbury 151 0 0 0 0 0 151 3 151 0 0 0 0 2 151 0 151 2 151 25 151 3
P.H.O.L. - Hamilton 480 0 5 0 5 0 473 19 473 0 0 0 0 34 473 4 473 4 473 135 473 3
P.H.O.L. - Peterborough 289 0 0 0 0 0 289 21 288 0 0 0 0 8 288 1 287 0 288 56 287 4
St. Joseph's - Hamilton 5484 0 4 0 4 0 5478 496 5478 2 0 585 0 0 5478 36 5478 11 5478 1102 0 0
Province of Ontario 26938 1 18 3 22 0 26325 2369 18606 2 0 666 0 1257 18607 328 18282 50 18571 4906 12765 211
Manitoba    22350 1 3 3 7 0 22350 145 337 1 1 35 0 0 337 6 1085 3 337 145 844 2
Province of Saskatchewan 6892 0 0 0 0 0 6873 21 1155 0 0 54 7 0 1155 19 1155 1 1155 239 1154 7
Province of Alberta 24063 0 2 4 6 0 9344 320 9344 0 5 494 60 0 9344 83 9344 11 9344 1830 9344 298
Prairies 53305 1 5 7 13 0 38567 486 10836 1 6 583 67 0 10836 108 11584 15 10836 2214 11342 307
British Columbia 33043 0 9 3 48 43 32933 1737 7039 0 0 810 56 86 7039 84 7035 34 6852 1608 6902 37
Yukon 2979 0 1 0 4 6 3044 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 214 0 0 0 0 0 198 0 35 0 0 0 0 0 35 2 35 0 197 31 35 0
Nunavut 3620 0 0 0 0 0 3616 4 8 0 0 0 0 0 8 1 8 0 8 5 8 0
Territories 6813 0 1 0 4 6 6858 8 43 0 0 0 0 0 43 3 43 0 205 36 43 0
CANADA 157023 2 33 20 94 57 137604 11163 49728 6 12 2408 126 1462 49647 745 49524 224 45852 10789 38041 618

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: 32 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) and Northwest Territories (NT) are sent to reference laboratories in other provinces and reported results reflect specimens identified as originating from YT or NT.

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 0.10 0.04 8.42 1.08 3.39 0.10 0.03 0.71 0.12 0.31 8.18 0.05 3.35 0.83 1.92 10.27 0.03 4.81 2.94 3.70 1.42 0.22 2.88 1.18 2.20 0.77 0.13 1.08 0.23 0.47 21.44 9.23 23.82 16.75 21.34 2.21 0.00 2.59 0.21 0.88
45 2021-11-13 0.08 0.02 9.83 1.18 4.19 0.06 0.02 0.97 0.22 0.44 7.33 0.04 4.43 1.29 2.59 9.97 0.01 5.42 2.53 4.01 1.61 0.33 2.68 2.02 2.42 0.64 0.01 1.30 0.04 0.77 22.40 9.70 23.08 15.17 20.56 2.54 0.03 2.74 0.52 0.96
46 2021-11-20 0.10 0.03 13.95 1.42 5.47 0.05 0.01 1.49 0.09 0.58 7.49 0.06 6.33 1.38 3.29 8.29 0.04 5.72 1.62 4.19 2.51 0.30 2.90 1.99 2.53 0.99 0.04 1.43 0.18 0.79 21.36 9.02 22.77 15.28 19.27 3.05 0.03 3.32 0.46 1.25
47 2021-11-27 0.16 0.03 15.24 1.25 6.91 0.07 0.04 2.13 0.13 0.80 8.47 0.03 8.69 1.79 4.46 6.71 0.06 7.00 2.36 4.72 2.00 0.32 2.95 1.83 2.35 1.06 0.02 2.02 0.09 0.89 18.07 8.44 20.84 12.15 16.09 3.97 0.04 3.26 0.37 1.25

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
44 405 56 30 777 67 1,134 32
45 447 72 29 932 88 1,144 24
46 366 111 44 869 106 1,076 26
47 301 88 47 721 141 1,223 39

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 15471 0.10 0.10 577 0.00 0.00 2323 0.00 0.00 2473 0.04 0.00 5041 0.00 0.00 4625 0.30 0.28 432 0.23 0.69
45 2021-11-13 17547 0.08 0.06 1195 0.00 0.00 2441 0.04 0.00 2836 0.07 0.00 5278 0.08 0.00 5054 0.14 0.18 743 0.00 0.13
46 2021-11-20 16413 0.10 0.05 1826 0.00 0.00 2261 0.00 0.04 2620 0.19 0.00 4924 0.04 0.00 4339 0.21 0.18 443 0.23 0.00
47 2021-11-27 16651 0.16 0.07 2042 0.05 0.05 2584 0.12 0.04 2914 0.31 0.00 4668 0.00 0.00 4195 0.33 0.24 248 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 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 13870 8.18 564 1.24 2048 26.46 2421 10.45 3797 1.69 4612 5.77 428 0.47
45 2021-11-13 15615 7.33 837 0.84 2239 18.49 2767 9.97 4011 1.75 5024 7.48 737 0.14
46 2021-11-20 14363 7.49 1259 2.54 2064 12.74 2557 13.38 3729 2.25 4312 8.23 442 0.00
47 2021-11-27 14441 8.47 1607 2.68 2132 11.16 2906 13.63 3395 3.62 4155 10.18 246 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 3942 10.27 415 10.84 293 0.34 1690 10.00 835 8.26 708 17.09
45 2021-11-13 4483 9.97 708 6.78 317 0.95 1772 8.47 864 9.72 819 19.78
46 2021-11-20 4414 8.29 597 4.02 349 0.57 1736 6.80 975 9.33 756 17.33
47 2021-11-27 4488 6.71 575 4.35 475 0.84 1897 5.96 999 7.41 540 15.74

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 3942 1.42 415 0.96 293 1.02 1690 1.60 835 1.44 708 1.41
45 2021-11-13 4480 1.61 705 0.71 317 6.62 1772 1.47 864 1.04 819 1.22
46 2021-11-20 4422 2.51 598 0.50 356 7.30 1736 2.25 975 2.05 756 3.04
47 2021-11-27 4394 2.00 576 0.69 380 3.68 1897 2.79 999 0.80 540 1.67

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 3903 0.77 415 0.00 210 6.19 1663 0.24 906 0.33 708 1.41
45 2021-11-13 4537 0.64 705 0.14 325 4.92 1742 0.17 943 0.21 819 0.85
46 2021-11-20 4436 0.99 597 0.17 349 8.02 1705 0.35 1028 0.49 756 0.53
47 2021-11-27 4440 1.06 575 0.52 380 8.68 1897 0.47 1046 0.00 540 0.37

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 3624 21.44 415 16.39 N.A. N.A. 1675 23.28 835 17.96 689 24.38
45 2021-11-13 4161 22.40 709 12.83 N.A. N.A. 1766 27.18 864 21.06 812 21.55
46 2021-11-20 4068 21.36 597 13.57 N.A. N.A. 1736 23.33 975 21.85 743 22.21
47 2021-11-27 3991 18.07 575 11.83 N.A. N.A. 1880 21.33 999 16.22 525 16.95

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 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 3464 2.54 326 0.92 317 0.32 1142 2.19 864 6.71 812 0.12
46 2021-11-20 3479 3.05 310 2.90 349 0.86 1048 2.77 1028 4.96 743 1.88
47 2021-11-27 3552 3.97 305 3.61 475 1.47 1246 3.85 999 6.91 525 1.14

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