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Respiratory Virus Report, Week 38 - ending September 23, 2023

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Organization: Public Health Agency of Canada

Please note that the Respiratory Virus Detection Surveillance System (RVDSS) is a sentinel laboratory surveillance system that does not capture all respiratory virus testing performed in Canada; differences may exist between the data presented in this report and provincial/territorial epidemiological reports. SARS-CoV-2 laboratory data is included in this report to facilitate the comparison of positivity with other respiratory viruses. Interpretation should be made with caution as testing practices differ among viruses.

For additional SARS-CoV-2 surveillance information, please refer to the COVID-19 epidemiology update.

Overall summary

In week 38 (week ending September 23, 2023) in Canada, participating RVDSS laboratories reported 6,665 detections of SARS-CoV-2 from 35,767 tests (18.6% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 6,546 to 19,666 tests), activity of enterovirus/rhinovirus is highest.

  • There has been an observed increase in national SARS-CoV-2 percent positivity since early-July.
  • While activity of enterovirus/rhinovirus is highest and increasing, this is expected for this time of year and activity remains below expected levels (1,353 detections; 20.0% positive).
  • Activity of all other non-SARS-CoV-2 respiratory viruses is low and near expected levels typical of this time of year.
  • 34/34 sentinel laboratories reported surveillance data

On this page

Abbreviations:
ADV
Adenovirus
Atl
Atlantic Canada
BC
British Columbia
Can
Canada
EORLA
Eastern Ontario Regional Laboratory Association
EV/RV
Enterovirus/Rhinovirus
Flu
Influenza
Flu A(H1)pdm09
Influenza A(H1N1)pdm09
Flu A(H3)
Influenza A(H3N2)
Flu A(UnS)
Influenza A(Unsubtyped)
HCoV
Human coronavirus 229E/OC43/NL63/HKU1
HMPV
Human metapneumovirus
HPIV
Human parainfluenza virus
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
RSV
Respiratory syncytial virus
RVDSS
Respiratory Virus Detection Surveillance System
SARS-CoV-2
Severe acute respiratory syndrome coronavirus 2
Terr
Territories of Canada
UHN
University Health Network

Respiratory virus detections

Table 1: Respiratory virus detections for the week ending September 23, 2023 (surveillance week 2023-38)
Reporting Laboratory SARS-CoV-2 Tested SARS-CoV-2 Positive 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 465 66 299 0 0 0 0 0 299 2 299 0 2 0 5 0 299 4 299 0 299 74 299 0
Prince Edward Island N.R. N.R. 6 0 0 0 0 0 6 0 5 0 0 0 0 0 5 0 5 0 5 3 5 0
Nova Scotia 1324 327 549 0 0 1 1 0 549 10 52 4 0 1 0 0 52 1 52 0 52 20 52 0
New Brunswick 840 107 534 0 0 0 0 0 527 6 73 0 0 0 0 0 73 0 73 0 73 21 73 0
Atlantic 2629 500 1388 0 0 1 1 0 1381 18 429 4 2 1 5 0 429 5 429 0 429 118 429 0
Région Nord-Est 1678 314 1144 0 0 1 1 0 283 3 66 1 0 0 1 0 66 0 66 1 N.C. N.C. 66 0
Québec-Chaudière-Appalaches 2446 502 506 0 0 5 5 0 506 17 226 0 1 0 3 0 238 6 226 2 N.C. N.C. 226 0
Centre-du-Québec 2314 540 418 0 0 0 0 0 418 12 32 3 0 0 0 0 32 0 32 2 N.C. N.C. 32 0
Montréal-Laval 3463 541 1386 0 0 4 4 0 1267 28 769 13 3 3 2 0 769 5 771 7 N.C. N.C. 769 7
Ouest du Québec 1931 514 439 0 0 4 4 0 438 8 21 2 0 0 0 0 21 1 21 0 N.C. N.C. 21 0
Montérégie 1625 344 839 0 0 0 0 0 738 14 6 0 0 0 0 0 6 0 6 0 N.C. N.C. 6 0
Province of Québec 13457 2755 4732 0 0 14 14 0 3650 82 1120 19 4 3 6 0 1132 12 1122 12 N.C. N.C. 1120 7
P.H.O.L. - Ottawa 363 142 234 0 0 0 0 0 234 2 128 0 0 0 0 0 128 0 128 0 128 17 128 0
EORLA 1174 110 417 0 0 1 1 0 417 21 31 0 0 0 0 0 31 0 31 0 31 9 31 0
P.H.O.L. - Kingston 378 119 155 0 0 0 0 0 155 0 112 0 0 0 0 4 112 0 112 0 112 24 112 1
UHN / Mount Sinai Hospital 946 86 529 0 0 0 0 0 529 0 30 0 0 0 0 0 30 0 30 0 30 3 30 0
P.H.O.L. - Toronto 714 218 928 8 3 0 5 0 928 6 837 0 0 0 0 26 837 7 837 3 837 209 837 6
Shared Hospital Laboratory 1010 119 1010 1 3 0 4 0 1011 16 1010 0 0 0 0 11 1009 8 1009 0 1009 78 1009 3
P.H.O.L. - Sault Ste. Marie 27 22 29 0 0 0 0 0 29 0 14 0 0 0 0 0 14 0 14 0 14 4 14 0
P.H.O.L. - Timmins 25 6 18 0 0 0 0 0 18 0 18 0 0 0 0 3 18 0 18 0 18 3 18 0
St. Joseph's - London 744 93 52 0 0 0 0 0 52 0 52 0 0 0 0 1 52 1 52 0 52 14 52 0
P.H.O.L. - London 545 172 325 0 0 0 0 0 325 1 265 0 0 0 0 12 265 1 265 0 265 68 265 0
P.H.O.L. - Orillia 20 3 29 1 0 0 1 0 28 1 26 0 0 0 0 1 26 1 26 0 26 5 26 0
P.H.O.L. - Thunder Bay 72 33 30 0 0 0 0 0 30 0 27 0 0 0 0 1 27 0 27 0 27 7 27 0
P.H.O.L. - Sudbury 14 3 16 0 0 0 0 0 16 0 16 0 0 0 0 0 16 0 16 0 16 2 16 0
P.H.O.L. - Hamilton 392 117 258 0 0 0 0 0 258 1 181 0 0 0 0 7 181 1 181 1 181 63 181 1
P.H.O.L. - Peterborough 118 57 78 0 0 0 0 0 78 3 69 0 0 0 0 2 69 0 69 0 69 23 69 1
St. Joseph's - Hamilton 1754 245 1370 0 0 2 2 3 1370 21 1370 0 0 6 0 0 1370 6 1370 2 1370 192 0 0
Sault Area Hospital 89 12 72 0 0 0 0 0 72 0 72 0 0 0 0 0 72 1 72 0 72 20 72 0
Province of Ontario 8385 1557 5550 10 6 3 13 3 5550 72 4258 0 0 6 0 68 4257 26 4257 6 4257 741 2887 12
Manitoba 1624 329 1200 0 0 3 3 1 1200 0 87 0 1 0 4 0 87 3 145 0 87 44 145 0
Saskatchewan 1676 166 755 0 0 6 6 0 738 3 358 0 0 0 4 0 358 12 358 2 358 87 358 1
Alberta 4603 612 3037 12 2 0 14 0 2845 11 878 2 2 0 0 0 878 7 875 0 868 177 878 3
Prairies 7903 1107 4992 12 2 9 23 1 4783 14 1323 2 3 0 8 0 1323 22 1378 2 1313 308 1381 4
British Columbia 3216 724 2910 10 3 0 43 0 2910 15 758 3 2 1 5 0 758 8 758 11 729 178 729 4
Yukon 62 7 27 0 0 0 0 0 27 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 29 1 22 0 0 0 0 0 22 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 22 8 N.C. N.C.
Nunavut 86 14 45 0 0 0 0 0 45 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 177 22 94 0 0 0 0 0 94 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 22 8 N.C. N.C.
CANADA 35767 6665 19666 32 11 27 94 4 18368 201 7888 28 11 11 24 68 7899 73 7944 31 6750 1353 6546 27

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.

Some 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 comprise of specimens from the following sites: Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Vancouver Coastal Health sites, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites and Northern Health Authority sites.

Due to different testing protocols of laboratories across Canada, influenza A subtype detection counts may not be included in total influenza A detection counts. Total influenza A and B positive counts are used to calculate percentage of tests positive.

Delays in the reporting of data may cause data to change retrospectively.

Table 2: Cumulative respiratory virus detections from August 27, 2023 to September 23, 2023 (surveillance weeks 2023-35 to 2023-38)
Reporting Laboratory SARS-CoV-2 Tested SARS-CoV-2 Positive 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 1846 293 1157 0 0 0 0 0 1157 8 1157 1 3 1 11 0 1157 15 1157 2 1157 269 1157 3
Prince Edward Island 373 44 34 0 0 0 0 0 34 0 28 0 0 0 1 0 28 4 28 0 28 14 28 0
Nova Scotia 4455 1065 1685 0 0 1 1 0 1685 11 144 9 1 1 1 0 144 4 144 1 144 42 144 0
New Brunswick 2930 407 1759 0 0 1 1 0 1722 8 218 2 1 0 1 0 218 4 218 0 218 53 218 1
Atlantic 9604 1809 4635 0 0 2 2 0 4598 27 1547 12 5 2 14 0 1547 27 1547 3 1547 378 1547 4
Région Nord-Est 5493 828 3857 0 0 4 4 0 790 7 213 3 2 0 7 0 213 1 212 6 N.C. N.C. 213 0
Québec-Chaudière-Appalaches 7763 1316 1795 0 0 9 9 1 1795 40 843 4 1 1 5 0 888 40 843 10 N.C. N.C. 843 1
Centre-du-Québec 7753 1648 1057 0 0 1 1 1 1054 23 121 6 2 1 2 0 121 3 121 2 N.C. N.C. 121 1
Montréal-Laval 12581 1973 4858 0 0 18 18 3 4421 72 2619 32 9 10 12 0 2619 33 2622 24 N.C. N.C. 2619 18
Ouest du Québec 5971 1357 1472 0 0 6 6 2 1471 28 69 4 2 1 2 0 69 4 69 2 N.C. N.C. 69 1
Montérégie 5139 1046 2854 0 0 8 8 2 2590 39 23 1 0 0 0 0 23 0 23 0 N.C. N.C. 23 0
Province of Québec 44700 8168 15893 0 0 46 46 9 12121 209 3888 50 16 13 28 0 3933 81 3890 44 N.C. N.C. 3888 21
P.H.O.L. - Ottawa 1685 632 865 1 0 0 1 0 865 7 452 0 0 0 0 2 452 0 452 0 452 73 452 0
EORLA 4292 441 1416 0 0 3 3 0 1416 50 113 0 1 1 0 0 113 0 113 0 113 27 113 0
P.H.O.L. - Kingston 1027 271 391 0 0 0 0 0 391 0 306 0 0 0 0 12 306 0 306 0 306 76 306 1
UHN / Mount Sinai Hospital 3550 229 1933 0 0 2 2 2 1933 1 89 0 0 2 0 0 89 1 89 0 89 7 89 0
P.H.O.L. - Toronto 2191 634 3182 30 9 1 25 0 3182 12 2926 0 0 0 0 98 2926 33 2924 10 2926 669 2924 11
Shared Hospital Laboratory 3624 323 3624 3 7 0 10 1 3625 55 3620 0 0 0 0 39 3619 31 3626 4 3626 278 3626 9
P.H.O.L. - Sault Ste. Marie 39 28 44 0 0 0 0 0 44 0 29 0 0 0 0 0 29 0 29 0 29 6 29 0
P.H.O.L. - Timmins 95 17 71 0 0 0 0 0 71 0 59 0 0 0 0 5 59 1 59 0 59 13 59 0
St. Joseph's - London 2475 248 196 0 0 0 0 0 196 1 196 0 0 0 0 2 196 2 196 0 196 39 196 0
P.H.O.L. - London 1566 479 1020 0 0 0 0 1 1020 3 808 0 0 0 0 28 808 4 808 0 808 176 808 0
P.H.O.L. - Orillia 77 10 124 1 0 0 1 0 123 2 112 0 0 0 0 3 112 2 112 0 112 29 112 0
P.H.O.L. - Thunder Bay 214 71 105 0 0 0 0 0 105 0 91 0 0 0 0 2 91 1 91 1 91 20 91 0
P.H.O.L. - Sudbury 60 22 71 0 0 0 0 0 71 0 57 0 0 0 0 0 58 0 57 0 57 14 57 0
P.H.O.L. - Hamilton 1250 358 848 1 1 0 1 0 848 3 554 0 0 0 0 23 554 5 554 5 554 142 554 1
P.H.O.L. - Peterborough 219 72 199 0 0 0 0 0 199 8 180 0 0 0 0 3 180 1 180 0 180 64 180 1
St. Joseph's - Hamilton 6014 676 4945 0 0 8 8 7 4945 49 4945 0 0 13 0 0 4945 27 4945 13 4945 463 0 0
Sault Area Hospital 261 22 221 0 1 0 1 0 214 2 214 0 0 0 0 0 214 4 214 0 214 49 224 0
Province of Ontario 28639 4533 19255 36 18 14 52 11 19248 193 14751 0 1 16 0 217 14751 112 14755 33 14757 2145 9820 23
Manitoba 5322 869 4192 0 0 8 8 3 4192 0 261 0 3 2 8 0 261 19 416 0 261 109 416 1
Saskatchewan 5182 452 2369 0 0 7 7 0 2313 9 1025 3 4 0 4 0 1025 41 1004 5 975 227 1025 3
Alberta 15438 1863 10836 47 14 1 62 2 10199 26 3488 9 11 3 2 0 3488 34 3474 0 3434 588 3488 16
Prairies 25942 3184 17397 47 14 16 77 5 16704 35 4774 12 18 5 14 0 4774 94 4894 5 4670 924 4929 20
British Columbia 11618 2285 9888 95 25 6 162 3 9871 38 2691 11 8 7 27 0 2691 56 2691 18 2575 505 2575 8
Yukon 243 37 129 0 1 0 2 0 129 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 40 4 30 0 0 0 0 0 30 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 30 9 N.C. N.C.
Nunavut 294 32 204 0 0 0 0 0 204 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.
Territories 577 73 363 0 1 0 2 0 363 1 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 30 9 N.C. N.C.
CANADA 121080 20052 67431 178 58 84 341 28 62905 503 27651 85 48 43 83 217 27696 370 27777 103 23579 3961 22759 76

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.

Some 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 comprise of specimens from the following sites: Children's and Women's Hospital Laboratory, Fraser Health Medical Microbiology Laboratory, Island Health, Providence Health Care, Vancouver Coastal Health sites, Victoria General Hospital, BCCDC Public Health Laboratory, Interior Health Authority sites and Northern Health Authority sites.

Due to different testing protocols of laboratories across Canada, influenza A subtype detection counts may not be included in total influenza A detection counts. Total influenza A and B positive counts are used to calculate percentage of tests positive.

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.

Positive respiratory virus tests historical comparison

Figure 1: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza, and respiratory syncytial 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: Changes to testing practices during the COVID-19 pandemic may cause substantial changes to indicator estimates from previous years. Collection of laboratory testing practice meta-data to understand these changes is ongoing. Interpret trends with caution.

Note: SARS-CoV-2 surveillance was integrated into RVDSS at the beginning of the 2022-2023 season; no prior data is available for historical comparison.

Note: Data from week 11 of the 2019-2020 season onwards are excluded from the historical comparison due to the COVID-19 pandemic.

Figure 1: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza, and respiratory syncytial 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 2023-2024 SARS-CoV-2% 2022-2023 SARS-CoV-2% 2023-2024 A% 2022-2023 A% 2021-2022 A% Max A% Base Min A% Base Av A% Base 2023-2024 B% 2022-2023 B% 2021-2022 B% Max B% Base Min B% Base Av B% Base 2023-2024 RSV% 2022-2023 RSV% 2021-2022 RSV% Max RSV% Base Min RSV% Base Av RSV% Base
35 2023-09-02 14.45 13.40 0.70 0.18 0.04 1.60 0.11 0.67 0.06 0.02 0.00 0.28 0.00 0.14 0.55 1.12 4.43 1.34 0.38 0.61
36 2023-09-09 15.90 13.07 0.42 0.14 0.01 2.11 0.23 0.99 0.06 0.04 0.00 0.55 0.00 0.15 0.68 1.12 6.61 1.09 0.22 0.62
37 2023-09-16 16.51 12.74 0.45 0.23 0.03 1.59 0.35 0.87 0.03 0.01 0.00 0.19 0.04 0.12 0.78 1.06 7.59 1.37 0.38 0.65
38 2023-09-23 18.63 13.62 0.48 0.48 0.00 2.15 0.43 1.17 0.02 0.02 0.00 0.21 0.00 0.14 1.09 1.47 7.16 1.24 0.37 0.67
Figure 2: Positive tests (%) of other respiratory viruses reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season
Figure 2

Shaded area represents the maximum and minimum % of respiratory virus tests positive reported by week from seasons 2014-2015 to 2019-2020

Note: Changes to testing practices during the COVID-19 pandemic may cause substantial changes to indicator estimates from previous years. Collection of laboratory testing practice meta-data to understand these changes is ongoing. Interpret trends with caution.

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

Figure 2: Positive tests (%) of other respiratory viruses reported by participating laboratories in Canada by surveillance week compared to average and range from 2014-2015 to 2019-2020 season
Week Week end 2023-2024 EV/RV% 2022-2023 EV/RV% 2021-2022 EV/RV% Max EV/RV% Base Min EV/RV% Base Av EV/RV% Base 2023-2024 HPIV% 2022-2023 HPIV% 2021-2022 HPIV% Max HPIV% Base Min HPIV% Base Av HPIV% Base 2023-2024 ADV% 2022-2023 ADV% 2021-2022 ADV% Max ADV% Base Min ADV% Base Av ADV% Base 2023-2024 HMPV% 2022-2023 HMPV% 2021-2022 HMPV% Max HMPV% Base Min HMPV% Base Av HMPV% Base 2023-2024 HCoV% 2022-2023 HCoV% 2021-2022 HCoV% Max HCoV% Base Min HCoV% Base Av HCoV% Base
35 2023-09-02 12.62 15.47 21.96 27.19 22.44 24.71 1.99 2.80 5.99 3.16 1.15 2.44 1.57 2.28 1.18 1.74 0.99 1.43 0.34 1.80 0.23 2.04 0.10 0.78 0.30 0.53 1.05 0.76 0.18 0.45
36 2023-09-09 14.92 16.22 18.59 30.69 23.30 26.31 1.47 3.21 4.93 3.31 1.35 2.32 1.49 2.18 1.15 2.85 1.42 1.87 0.37 1.81 0.24 0.84 0.10 0.48 0.43 0.38 0.62 0.38 0.12 0.22
37 2023-09-16 18.43 21.73 27.46 33.58 27.74 31.69 1.62 3.02 5.97 3.26 1.65 2.40 1.45 2.10 0.81 2.44 1.38 1.86 0.38 1.38 0.17 1.61 0.00 0.51 0.20 0.28 0.44 0.56 0.00 0.26
38 2023-09-23 20.04 23.50 33.19 39.57 32.80 35.83 1.80 2.42 4.73 2.87 1.92 2.33 0.92 1.58 0.82 2.04 1.11 1.63 0.39 1.61 0.37 1.43 0.06 0.48 0.41 0.32 0.67 1.36 0.06 0.43

Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests

Figure 3: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests (%) in Canada by region by surveillance week
Figure 3

Note: Differences in positivity between jurisdictions can reflect differences in testing practices. Please interpret with caution.

Figure 3: Positive severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests (%) in Canada by region by surveillance week
Week Week end Can Tests SARS-CoV-2% Atl Tests SARS-CoV-2% QC Tests SARS-CoV-2% ON Tests SARS-CoV-2% Pr Tests SARS-CoV-2% BC Tests SARS-CoV-2% Terr Tests SARS-CoV-2%
35 2023-09-02 25536 14.45 2110 16.92 9351 16.30 6144 12.47 5158 10.66 2651 18.03 122 11.48
36 2023-09-09 28165 15.90 2346 20.20 10215 17.37 6856 15.53 5979 11.76 2640 16.70 129 17.05
37 2023-09-16 31612 16.51 2519 18.98 11677 18.11 7254 15.78 6902 11.94 3111 20.64 149 10.07
38 2023-09-23 35767 18.63 2629 19.02 13457 20.47 8385 18.57 7903 14.01 3216 22.51 177 12.43

Positive influenza (Flu) tests

Figure 4: Positive influenza (Flu) tests (%) in Canada by region by surveillance week
Figure 4
Figure 4: 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 2023-09-02 14465 0.70 0.06 984 0.00 0.00 3339 0.24 0.15 4253 0.40 0.09 3647 0.58 0.00 2158 2.46 0.00 84 2.38 0.00
36 2023-09-09 15345 0.42 0.06 1047 0.00 0.00 3649 0.19 0.03 4379 0.27 0.09 4060 0.37 0.05 2117 1.46 0.09 93 0.00 0.00
37 2023-09-16 17955 0.45 0.03 1216 0.08 0.00 4173 0.41 0.07 5073 0.20 0.00 4698 0.38 0.04 2703 1.29 0.04 92 0.00 0.00
38 2023-09-23 19666 0.48 0.02 1388 0.07 0.00 4732 0.30 0.00 5550 0.23 0.05 4992 0.46 0.02 2910 1.48 0.00 94 0.00 0.00

Positive respiratory syncytial virus (RSV) tests

Figure 5: Positive respiratory syncytial virus (RSV) tests (%) in Canada by region by surveillance week
Figure 5
Figure 5: 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 2023-09-02 13532 0.55 969 0.00 2540 1.14 4253 0.80 3528 0.09 2158 0.32 84 1.19
36 2023-09-09 14276 0.68 1047 0.57 2750 1.64 4379 0.82 3906 0.13 2101 0.24 93 0.00
37 2023-09-16 16729 0.78 1201 0.25 3181 1.67 5066 1.01 4487 0.29 2702 0.41 92 0.00
38 2023-09-23 18368 1.09 1381 1.30 3650 2.25 5550 1.30 4783 0.29 2910 0.52 94 0.00

Positive human parainfluenza virus (HPIV) tests

Figure 6: Positive human parainfluenza virus (HPIV) tests (%) in Canada by region by surveillance week
Figure 6
Figure 6: 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 2023-09-02 6183 1.99 362 1.38 847 3.90 3335 1.83 1004 1.10 635 2.05
36 2023-09-09 6245 1.47 355 1.69 868 2.19 3344 1.41 1133 0.97 545 1.65
37 2023-09-16 7335 1.62 401 2.49 1053 2.18 3814 1.36 1314 1.07 753 2.66
38 2023-09-23 7888 1.80 429 2.80 1120 2.86 4258 1.74 1323 0.98 758 1.45

Positive adenovirus (ADV) tests

Figure 7: Positive adenovirus (ADV) tests (%) in Canada by region by surveillance week
Figure 7
Figure 7: 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 2023-09-02 6187 1.57 362 1.93 851 2.70 3335 0.81 1004 2.39 635 2.52
36 2023-09-09 6256 1.49 355 1.97 879 2.28 3344 0.78 1133 1.94 545 3.30
37 2023-09-16 7354 1.45 401 2.00 1071 2.43 3815 0.87 1314 1.98 753 1.86
38 2023-09-23 7899 0.92 429 1.17 1132 1.06 4257 0.61 1323 1.66 758 1.06

Positive human metapneumovirus (HMPV) tests

Figure 8: Positive human metapneumovirus (HMPV) tests (%) in Canada by region by surveillance week
Figure 8
Figure 8: 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 2023-09-02 6199 0.34 362 0.00 848 1.42 3336 0.21 1018 0.10 635 0.16
36 2023-09-09 6262 0.37 355 0.28 867 1.38 3347 0.18 1148 0.17 545 0.37
37 2023-09-16 7372 0.38 401 0.50 1053 0.76 3815 0.37 1350 0.00 753 0.53
38 2023-09-23 7944 0.39 429 0.00 1122 1.07 4257 0.14 1378 0.15 758 1.45

Positive enterovirus/rhinovirus (EV/RV) tests

Figure 9: Positive enterovirus/rhinovirus (EV/RV) tests (%) in Canada by region by surveillance week
Figure 9
Figure 9: 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 2023-09-02 5279 12.62 362 20.72 - - 3338 10.55 971 14.73 608 15.79
36 2023-09-09 5322 14.92 355 25.35 - - 3347 12.88 1103 16.77 516 17.05
37 2023-09-16 6228 18.43 401 23.69 - - 3815 16.28 1283 22.45 722 19.81
38 2023-09-23 6750 20.04 429 27.51 - - 4257 17.41 1313 23.46 729 24.42

Positive human coronavirus (HCoV) tests

Figure 10: Positive human coronavirus (HCoV) tests (%) in Canada by region by surveillance week
Figure 10
Figure 10: 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 2023-09-02 5003 0.30 362 0.00 847 0.47 2159 0.14 1027 0.68 608 0.16
36 2023-09-09 5119 0.43 355 0.56 868 0.81 2209 0.09 1171 0.77 516 0.39
37 2023-09-16 6091 0.20 401 0.50 1053 0.28 2565 0.23 1350 0.00 722 0.14
38 2023-09-23 6546 0.41 429 0.00 1120 0.63 2887 0.42 1381 0.29 729 0.55

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