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Respiratory Virus Report, week 1 - ending January 8, 2022

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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 1 (January 2 to January 8, 2022), activity of almost all respiratory viruses is within or below expected levels for this time of year. Total number of respiratory virus detections have decreased in recent weeks.

  • Respiratory syncytial virus (1,071 detections; 4.6% positive) is the most common seasonal respiratory viruses detected in Canada. Activity has decreased in recent weeks and is now below expected levels.
  • Detections of other respiratory viruses are low, but activity of seasonal human coronavirus (250 detections; 8.6% positive) is above expected levels.
  • The number of tests performed for each virus is either within or above expected levels.
  • Due to the current COVID-19 pandemic, changes in laboratory testing practices for the past week may affect the comparability of data to previous weeks.
  • 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 January 8, 2022 (surveillance week 2022-01)
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 5 0 0 0 0 0 5 1 5 0 0 0 0 0 6 0 2 0 5 1 N.C. N.C.
Prince Edward Island 55 0 0 0 0 0 55 10 10 0 0 1 0 0 55 3 55 2 55 4 55 2
Nova Scotia 462 0 0 0 0 0 462 16 24 0 0 0 0 0 24 1 24 0 24 2 24 2
New Brunswick 445 0 0 0 0 0 461 38 20 0 0 0 0 0 20 0 20 0 20 0 20 0
Atlantic 967 0 0 0 0 0 983 65 59 0 0 1 0 0 105 4 101 2 104 7 99 4
Région Nord-Est 874 0 0 1 1 0 363 13 1 0 0 0 0 0 1 0 0 0 N.C. N.C. 1 0
Québec-Chaudière-Appalaches 208 0 0 0 0 0 201 8 28 0 2 0 0 0 96 5 96 10 N.C. N.C. 96 20
Centre-du-Québec 302 0 0 0 0 0 290 8 20 0 0 0 0 0 20 2 20 3 N.C. N.C. 20 1
Montréal-Laval   582 0 0 3 3 0 571 10 179 1 0 0 0 0 179 15 179 11 N.C. N.C. 179 4
Ouest du Québec 202 0 0 0 0 0 202 9 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Montérégie 81 0 0 0 0 0 81 2 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 2249 0 0 4 4 0 1708 50 228 1 2 0 0 0 296 22 295 24 N.C. N.C. 296 25
P.H.O.L. - Ottawa 36 0 0 0 0 0 36 7 36 0 0 0 0 0 36 0 36 0 36 1 36 2
EORLA 260 0 0 0 0 0 260 21 28 0 0 0 0 0 28 1 28 1 28 3 28 1
P.H.O.L. - Kingston 47 0 0 0 0 0 47 8 47 0 0 0 0 0 47 0 47 0 47 3 47 12
UHN / Mount Sinai Hospital 704 0 0 0 0 0 704 5 25 0 0 0 0 0 25 0 25 0 25 2 25 0
P.H.O.L. - Toronto   320 0 1 0 1 0 319 8 319 0 0 0 0 3 319 1 319 1 319 11 319 14
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 12 0 0 0 0 0 12 0 12 0 0 0 0 0 12 0 12 0 12 1 12 1
P.H.O.L. - Timmins 34 0 0 0 0 0 34 0 34 0 0 0 0 0 34 0 34 0 34 1 34 7
St. Joseph's - London   939 0 0 1 1 0 939 52 939 0 0 0 0 1 939 12 939 0 939 23 5 0
P.H.O.L. - London 203 0 1 0 1 0 202 40 202 0 0 0 0 4 202 10 202 0 202 4 202 34
P.H.O.L. - Orillia 35 0 0 0 0 0 35 8 35 0 0 0 0 0 35 2 35 0 35 1 35 5
P.H.O.L. - Thunder Bay 20 0 0 0 0 0 20 0 20 0 0 0 0 2 20 0 20 0 20 2 20 6
P.H.O.L. - Sudbury 14 0 0 0 0 0 14 1 14 0 0 0 0 2 14 0 14 0 14 0 14 0
P.H.O.L. - Hamilton 31 0 0 0 0 0 31 0 31 0 0 0 0 0 31 0 31 0 31 0 31 2
P.H.O.L. - Peterborough 8 0 0 0 0 0 8 0 8 0 0 0 0 0 8 0 8 0 8 0 8 2
St. Joseph's - Hamilton 857 0 0 0 0 0 857 56 857 0 0 5 0 0 857 9 857 0 857 20 0 0
Province of Ontario 3520 0 2 1 3 0 3518 206 2607 0 0 5 0 12 2607 35 2607 2 2607 72 816 86
Province of Manitoba    2723 0 6 2 8 0 2723 55 114 0 0 4 0 0 114 1 129 0 114 5 129 7
Province of Saskatchewan 1468 0 0 3 3 0 1468 34 177 0 0 13 5 0 177 4 177 0 177 15 177 27
Province of Alberta 2566 0 1 1 2 0 954 186 954 0 1 12 2 0 954 6 954 2 954 75 954 88
Prairies 6757 0 7 6 13 0 5145 275 1245 0 1 29 7 0 1245 11 1260 2 1245 95 1260 122
British Columbia 10148 0 1 0 6 1 9785 433 448 0 1 9 9 0 448 11 448 6 434 43 434 13
Yukon 215 0 0 0 0 0 215 41 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 61 0 0 0 0 0 56 1 6 0 0 0 0 0 6 0 6 0 56 9 6 0
Nunavut 1734 0 0 0 0 0 1734 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 2010 0 0 0 0 0 2005 42 6 0 0 0 0 0 6 0 6 0 56 9 6 0
CANADA 25651 0 10 11 26 1 23144 1071 4593 1 4 44 16 12 4707 83 4717 36 4446 226 2911 250

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) are sent to reference laboratories in British Columbia and reported results reflect specimens identified as originating from YT.

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 January 8, 2022 (surveillance weeks 2021-35 to 2022-01)
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 7057 0 0 0 0 0 7056 72 7059 1 3 116 0 154 7066 21 7053 23 7060 1725 N.C. N.C.
Prince Edward Island 1561 0 0 0 0 0 1561 88 1516 0 0 152 0 0 1561 36 1561 3 1561 426 1561 98
Nova Scotia 8973 0 1 10 11 4 8973 208 1026 0 2 37 3 0 1040 9 1040 1 1040 93 1040 27
New Brunswick 7739 0 0 6 6 0 4704 228 2303 0 0 21 0 0 2296 6 2303 3 2303 32 2212 4
Atlantic 25330 0 1 16 17 4 22294 596 11904 1 5 326 3 154 11963 72 11957 30 11964 2276 4813 129
Région Nord-Est 11537 0 0 1 1 2 5673 1410 586 0 0 6 1 0 597 12 23 0 N.C. N.C. 597 6
Québec-Chaudière-Appalaches 3904 0 0 2 2 4 4454 983 618 0 3 6 4 0 919 34 831 41 N.C. N.C. 743 35
Centre-du-Québec 4554 0 0 3 3 4 4712 1071 361 0 0 19 0 0 361 14 369 15 N.C. N.C. 354 8
Montréal-Laval   13903 0 0 28 28 4 13860 2411 4170 4 2 20 4 0 4170 259 4167 302 N.C. N.C. 4167 48
Ouest du Québec 3513 0 1 6 7 0 3470 922 22 0 0 2 0 0 8 1 11 1 N.C. N.C. 11 1
Montérégie 2206 0 0 2 2 0 2199 386 0 0 0 0 0 0 0 0 0 0 N.C. N.C. 0 0
Province of Québec 39617 0 1 42 43 14 34368 7183 5757 4 5 53 9 0 6055 320 5401 359 N.C. N.C. 5872 98
P.H.O.L. - Ottawa 6152 2 1 0 3 0 6152 1425 6152 0 0 0 0 727 6152 309 6151 38 6152 2202 6151 235
EORLA 3830 0 0 0 0 0 3805 570 505 0 1 17 0 0 505 9 186 3 505 108 182 12
P.H.O.L. - Kingston 936 0 0 0 0 0 935 97 934 0 0 0 0 129 934 16 933 2 934 274 933 68
UHN / Mount Sinai Hospital 9071 0 0 8 8 0 9071 78 281 0 0 0 0 0 281 0 281 0 281 10 281 2
P.H.O.L. - Toronto   5415 0 12 0 12 0 5401 239 5401 0 0 0 0 260 5402 65 5400 10 5401 825 5401 160
Sick Kids Hospital - Toronto 839 0 0 0 0 0 0 0 839 0 2 68 1 0 839 12 839 1 839 233 839 10
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 173 0 1 0 1 0 171 4 171 0 0 0 0 7 171 1 171 0 171 47 171 2
P.H.O.L. - Timmins 211 0 0 0 0 0 211 6 211 0 0 0 0 15 211 1 211 0 211 29 211 12
St. Joseph's - London   6103 0 0 14 14 0 6106 624 4549 0 0 7 0 82 4549 75 4549 8 4503 344 467 1
P.H.O.L. - London 2082 0 6 0 6 0 2075 409 2075 0 0 0 0 142 2075 54 2075 7 2075 383 2075 142
P.H.O.L. - Orillia 558 0 1 0 1 0 558 91 558 0 0 0 0 41 558 21 556 5 558 154 556 34
P.H.O.L. - Thunder Bay 184 0 0 0 0 0 184 15 184 0 0 0 0 19 184 0 184 0 184 48 184 13
P.H.O.L. - Sudbury 211 0 0 0 0 0 211 8 211 0 0 0 0 8 211 1 211 2 211 27 211 4
P.H.O.L. - Hamilton 895 0 7 0 7 0 888 58 888 0 0 0 0 43 888 7 888 5 888 194 888 45
P.H.O.L. - Peterborough 462 0 0 0 0 0 462 44 461 0 0 0 0 11 461 1 459 0 461 79 459 29
St. Joseph's - Hamilton 11456 0 4 7 11 0 11450 1501 11450 2 0 644 0 0 11450 113 11450 23 11450 1508 0 0
Province of Ontario 48578 2 32 29 63 0 47680 5169 34870 2 3 736 1 1484 34871 685 34544 104 34824 6465 19009 769
Manitoba 35180 1 14 5 20 0 35180 526 740 1 3 66 0 0 740 13 1704 4 740 183 1510 20
Province of Saskatchewan 12545 0 0 7 7 0 12522 123 2055 0 0 167 19 0 2055 39 2055 1 2055 365 2054 96
Province of Alberta 38516 0 8 26 34 2 14583 1548 14583 0 16 634 119 0 14583 136 14583 30 14583 2447 14583 888
Prairies 86241 1 22 38 61 2 62285 2197 17378 1 19 867 138 0 17378 188 18342 35 17378 2995 18147 1004
British Columbia 89805 0 35 3 153 80 89415 6847 11364 3 5 1005 129 130 11364 193 11360 56 11093 2322 11142 181
Yukon 3939 0 1 0 4 7 4004 204 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 461 0 0 0 0 0 419 2 50 0 0 0 0 0 50 2 50 0 418 83 50 0
Nunavut 8081 0 0 0 0 0 8074 7 11 0 0 0 0 0 11 1 11 0 11 7 11 0
Territories 12481 0 1 0 4 7 12497 213 61 0 0 0 0 0 61 3 61 0 429 90 61 0
CANADA 302052 3 92 128 341 107 268539 22205 81334 11 37 2987 280 1768 81692 1461 81665 584 75688 14148 59044 2181

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: Included in the cumulative detections this season are 11 co-infections of influenza A and B (total of 22 detections) that are suspected to be associated with recent live attenuated influenza vaccine (LAIV) receipt. Co-infections known or reported to be associated with recent LAIV are removed by the submitting laboratory or by PHAC beginning in week 44 as they do not represent community transmission of seasonal influenza viruses.

Specimens from Yukon (YT) are sent to reference laboratories in British Columbia and reported results reflect specimens identified as originating from YT.

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 21.37 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 7.04 0.06 7.00 2.36 4.72 1.94 0.32 2.95 1.83 2.35 1.01 0.02 2.02 0.09 0.89 18.53 8.44 20.84 12.15 16.09 3.93 0.04 3.26 0.37 1.25
48 2021-12-04 0.20 0.04 18.07 0.76 9.40 0.15 0.01 3.18 0.08 1.20 9.32 0.02 9.47 3.11 5.72 5.77 0.02 6.14 3.03 4.18 1.89 0.35 3.34 1.66 2.48 1.48 0.02 1.94 0.31 1.08 16.61 7.94 16.72 12.69 13.83 4.96 0.02 4.30 1.00 2.04
49 2021-12-11 0.23 0.03 19.52 1.43 11.41 0.05 0.01 4.21 0.19 1.60 10.51 0.06 12.26 4.87 7.12 3.98 0.00 5.65 2.94 4.19 2.47 0.54 3.03 1.84 2.49 1.23 0.05 2.80 0.49 1.46 14.47 6.21 16.32 10.72 13.07 6.62 0.05 5.19 0.84 2.52
50 2021-12-18 0.26 0.01 26.42 1.97 14.27 0.02 0.01 7.95 0.15 2.55 10.78 0.07 13.19 5.39 7.93 3.05 0.06 5.95 2.54 4.27 2.76 0.51 3.27 1.49 2.45 1.13 0.02 3.32 0.46 1.70 11.92 6.62 13.85 8.43 10.90 7.35 0.11 6.04 1.54 3.16
51 2021-12-25 0.18 0.00 28.53 2.27 16.81 0.02 0.01 10.44 0.19 3.30 9.26 0.07 15.23 6.52 9.27 3.01 0.04 6.71 2.94 3.95 2.54 0.58 3.20 1.36 2.04 1.20 0.04 4.39 0.37 2.44 9.95 5.65 14.18 8.81 10.48 8.18 0.05 6.68 1.87 3.72
52 2022-01-01 0.09 0.00 33.97 3.30 20.41 0.01 0.00 12.73 0.23 4.07 6.95 0.01 17.80 6.83 10.39 2.12 0.03 5.08 2.87 3.75 1.91 0.48 2.59 1.20 1.76 1.01 0.11 3.81 0.41 2.44 7.72 6.53 14.41 6.24 9.23 10.29 0.07 6.73 2.78 4.75
1 2022-01-08 0.10 0.00 30.93 4.58 19.55 0.00 0.00 10.34 0.22 3.86 4.63 0.04 15.62 7.12 10.17 1.68 0.12 5.08 2.68 3.34 1.76 0.81 2.67 0.85 1.54 0.76 0.06 4.45 0.28 2.70 5.08 5.43 11.09 4.36 7.42 8.59 0.12 7.77 3.07 5.16

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
47 337 91 48 795 153 1,236 39
48 275 91 72 736 188 1,526 65
49 219 139 69 758 252 1 849 55
50 189 163 64 684 278 2 268 62
51 165 139 66 508 256 2,414 58
52 108 98 52 373 327 1,901 30
1 77 83 36 226 250 1,071 27

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 16418 0.10 0.05 1826 0.00 0.00 2261 0.00 0.04 2619 0.19 0.00 4930 0.04 0.00 4339 0.21 0.18 443 0.23 0.00
47 2021-11-27 16923 0.16 0.07 2042 0.05 0.05 2584 0.12 0.04 2985 0.30 0.00 4842 0.00 0.00 4200 0.33 0.24 270 0.00 0.00
48 2021-12-04 18563 0.00 0.00 3195 0.00 0.00 2471 0.00 0.00 3069 0.00 0.00 4731 0.00 0.00 4846 0.00 0.01 251 0.00 0.00
49 2021-12-11 19982 0.00 0.00 3417 0.00 0.00 2880 0.00 0.00 3420 0.00 0.00 4778 0.00 0.00 5172 0.00 0.00 315 0.00 0.00
50 2021-12-18 22550 0.00 0.00 1860 0.00 0.00 2759 0.00 0.00 3889 0.00 0.00 4879 0.00 0.00 8638 0.00 0.00 525 0.00 0.00
51 2021-12-25 28471 0.18 0.02 1238 0.00 0.00 3049 0.59 0.07 4030 0.07 0.00 5324 0.15 0.00 14257 0.16 0.02 573 0.00 0.17
52 2022-01-01 29531 0.09 0.01 1378 0.29 0.00 2560 0.00 0.00 3642 0.19 0.00 6283 0.11 0.02 13696 0.07 0.01 1972 0.00 0.00
1 2022-01-08 25651 0.10 0.00 967 0.00 0.00 2249 0.18 0.00 3520 0.09 0.00 6757 0.19 0.00 10148 0.06 0.01 2010 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 14367 7.49 1259 2.54 2064 12.74 2556 13.38 3734 2.25 4312 8.23 442 0.00
47 2021-11-27 14584 8.48 1607 2.68 2132 11.16 2907 13.62 3510 3.87 4160 10.17 268 0.00
48 2021-12-04 16376 9.32 2884 2.67 2164 8.27 3002 14.69 3272 4.68 4806 13.82 248 4.84
49 2021-12-11 17598 10.51 2979 3.63 2519 6.95 3354 19.11 3309 6.20 5134 13.63 303 6.60
50 2021-12-18 20240 11.21 1442 8.18 2354 5.61 3813 15.53 3496 7.44 8611 13.10 524 7.25
51 2021-12-25 26063 9.26 947 6.65 2467 4.82 4029 13.73 3796 9.69 14257 8.86 567 8.47
52 2022-01-01 27363 6.95 1378 4.43 1916 3.60 3639 10.09 4576 9.55 13884 6.64 1970 2.28
1 2022-01-08 23144 4.63 983 6.61 1708 2.93 3518 5.86 5145 5.34 9785 4.43 2005 2.09

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 4413 8.29 597 4.02 349 0.57 1735 6.80 975 9.33 756 17.33
47 2021-11-27 4787 7.04 575 4.35 475 0.84 1968 5.95 1058 7.84 709 15.23
48 2021-12-04 4768 5.77 668 3.29 355 1.13 2055 3.94 960 7.60 723 13.14
49 2021-12-11 5520 3.97 684 1.02 317 0.63 2722 2.94 1063 7.34 733 7.09
50 2021-12-18 5852 3.23 677 2.51 356 1.69 3058 1.60 1020 6.18 741 7.29
51 2021-12-25 5476 3.01 311 0.64 383 3.39 3031 1.55 997 6.12 751 5.59
52 2022-01-01 5099 2.12 132 1.52 287 0.35 2721 0.85 1198 3.92 760 4.61
1 2022-01-08 4593 1.68 59 1.69 228 1.32 2607 0.65 1245 2.97 448 4.24

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 4421 2.51 598 0.50 356 7.30 1735 2.25 975 2.05 756 3.04
47 2021-11-27 4693 1.94 576 0.69 380 3.68 1968 2.69 1058 0.76 709 1.69
48 2021-12-04 4816 1.89 668 0.75 403 4.71 2055 1.95 960 1.46 723 1.80
49 2021-12-11 5614 2.48 684 0.88 411 4.87 2722 3.23 1063 1.03 733 1.91
50 2021-12-18 5999 2.72 677 0.74 503 6.56 3058 2.88 1020 1.67 741 2.70
51 2021-12-25 5474 2.54 314 1.59 378 7.41 3031 2.18 997 1.20 751 3.73
52 2022-01-01 5137 1.91 133 3.76 324 5.56 2721 1.47 1198 1.25 760 2.63
1 2022-01-08 4707 1.76 105 3.81 296 7.43 2607 1.34 1245 0.88 448 2.46

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 4435 0.99 597 0.17 349 8.02 1704 0.35 1028 0.49 756 0.53
47 2021-11-27 4739 1.01 575 0.52 380 8.68 1968 0.46 1105 0.00 709 0.42
48 2021-12-04 4875 1.48 668 0.45 403 12.90 2055 0.44 1019 0.29 723 0.69
49 2021-12-11 5658 1.22 684 0.88 411 9.98 2721 0.55 1108 0.54 733 0.14
50 2021-12-18 5920 1.08 677 0.30 397 11.08 3057 0.46 1048 0.38 741 0.00
51 2021-12-25 5508 1.20 311 2.89 378 12.17 3031 0.13 1034 0.29 751 0.53
52 2022-01-01 5165 1.01 132 1.52 321 10.28 2721 0.37 1230 0.16 760 0.66
1 2022-01-08 4717 0.76 101 1.98 295 8.14 2607 0.08 1260 0.16 448 1.34

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 4067 21.37 597 13.57 N.A. N.A. 1735 23.34 975 21.85 743 22.21
47 2021-11-27 4290 18.53 575 11.83 N.A. N.A. 1951 21.78 1058 16.07 694 18.88
48 2021-12-04 4431 16.61 668 10.93 N.A. N.A. 2053 18.56 960 15.31 708 17.23
49 2021-12-11 5206 14.56 684 11.11 N.A. N.A. 2713 14.19 1063 14.77 716 18.30
50 2021-12-18 5522 12.39 677 7.68 N.A. N.A. 3058 10.99 1020 13.24 734 20.57
51 2021-12-25 5104 9.95 311 9.00 N.A. N.A. 3031 7.06 997 12.04 733 18.55
52 2022-01-01 4829 7.72 132 11.36 N.A. N.A. 2721 5.40 1198 9.93 747 11.91
1 2022-01-08 4446 5.08 104 6.73 N.A. N.A. 2607 2.76 1245 7.63 434 9.91

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 3478 3.05 310 2.90 349 0.86 1047 2.77 1028 4.96 743 1.88
47 2021-11-27 3898 3.93 305 3.61 475 1.47 1317 3.80 1105 6.88 694 1.30
48 2021-12-04 3792 4.96 368 4.89 465 1.94 1225 4.90 1019 8.93 708 1.41
49 2021-12-11 3830 6.58 369 5.42 356 1.97 1281 7.18 1108 11.01 715 1.54
50 2021-12-18 3815 7.29 356 6.18 496 3.02 1181 9.31 1048 10.21 734 3.27
51 2021-12-25 3131 8.18 69 10.14 378 2.91 914 10.83 1034 10.15 733 4.64
52 2022-01-01 3179 10.29 124 14.52 320 2.50 757 14.40 1230 11.63 747 6.56
1 2022-01-08 2911 8.59 99 4.04 296 8.45 816 10.54 1260 9.68 434 3.00

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