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Respiratory Virus Report, Week 37 - ending September 16, 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 37 (week ending September 16, 2023) in Canada, participating RVDSS laboratories reported 5,140 detections of SARS-CoV-2 from 30,976 tests (16.6% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 5,646 to 17,363 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 (1,056 detections; 18.1% positive).
  • Activity of all other non-SARS-CoV-2 respiratory viruses is low and near expected levels typical of this time of year.
  • 33/34 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 16, 2023 (surveillance week 2023-37)
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 479 67 296 0 0 0 0 0 296 3 296 1 1 0 1 0 296 5 296 2 296 62 296 1
Prince Edward Island 102 8 10 0 0 0 0 0 10 0 9 0 0 0 1 0 9 2 9 0 9 5 9 0
Nova Scotia 1131 281 412 0 0 0 0 0 412 0 45 2 1 0 1 0 45 0 45 0 45 15 45 0
New Brunswick 807 122 498 0 0 1 1 0 483 0 51 2 0 0 0 0 51 1 51 0 51 13 51 1
Atlantic 2519 478 1216 0 0 1 1 0 1201 3 401 5 2 0 3 0 401 8 401 2 401 95 401 2
Région Nord-Est 1429 190 934 0 0 1 1 0 191 2 46 1 0 0 0 0 46 0 46 0 N.C. N.C. 46 0
Québec-Chaudière-Appalaches 1989 339 468 0 0 1 1 0 468 11 242 2 0 1 0 0 259 10 242 2 N.C. N.C. 242 0
Centre-du-Québec 2103 478 242 0 0 0 0 1 241 5 24 0 1 0 1 0 24 1 24 0 N.C. N.C. 24 0
Montréal-Laval 3315 513 1299 0 0 8 8 1 1159 17 686 7 3 1 3 0 686 13 686 6 N.C. N.C. 686 1
Ouest du Québec 1537 345 418 0 0 1 1 1 418 6 20 1 1 0 0 0 20 2 20 0 N.C. N.C. 20 0
Montérégie 1315 252 789 0 0 6 6 0 677 11 7 1 0 0 0 0 7 0 7 0 N.C. N.C. 7 0
Province of Québec 11688 2117 4150 0 0 17 17 3 3154 52 1025 12 5 2 4 0 1042 26 1025 8 N.C. N.C. 1025 1
P.H.O.L. - Ottawa 482 162 260 0 0 0 0 0 260 2 96 0 0 0 0 0 96 0 96 0 96 16 96 0
EORLA 1075 113 353 0 0 0 0 0 353 12 47 0 0 1 0 0 47 0 47 0 47 13 47 0
P.H.O.L. - Kingston 214 60 95 0 0 0 0 0 95 0 69 0 0 0 0 2 69 0 69 0 69 16 69 0
UHN / Mount Sinai Hospital 948 60 549 0 0 1 1 0 549 0 25 0 0 0 0 0 25 1 25 0 25 2 25 0
P.H.O.L. - Toronto 522 187 890 4 3 1 6 0 890 2 822 0 0 0 0 26 822 9 822 4 822 200 822 1
Shared Hospital Laboratory 863 71 863 0 0 0 0 0 863 15 861 0 0 0 0 8 861 10 862 0 862 81 862 5
P.H.O.L. - Sault Ste. Marie 8 6 9 0 0 0 0 0 9 0 9 0 0 0 0 0 9 0 9 0 9 2 9 0
P.H.O.L. - Timmins 41 10 38 0 0 0 0 0 38 0 29 0 0 0 0 2 29 1 29 0 29 6 29 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. N.R. N.R.
P.H.O.L. - London 401 105 283 0 0 0 0 0 283 1 214 0 0 0 0 3 214 2 214 0 214 45 214 0
P.H.O.L. - Orillia 13 1 25 0 0 0 0 0 25 0 25 0 0 0 0 0 25 1 25 0 25 6 25 0
P.H.O.L. - Thunder Bay 53 13 28 0 0 0 0 0 28 0 26 0 0 0 0 0 26 0 26 0 26 3 26 0
P.H.O.L. - Sudbury 27 16 33 0 0 0 0 0 33 0 21 0 0 0 0 0 22 0 21 0 21 6 21 0
P.H.O.L. - Hamilton 324 66 217 0 1 0 1 0 217 1 148 0 0 0 0 6 148 1 148 4 148 37 148 0
P.H.O.L. - Peterborough 38 8 51 0 0 0 0 0 51 2 48 0 0 0 0 1 48 0 48 0 48 19 48 0
St. Joseph's - Hamilton 1542 188 1250 0 0 2 2 0 1250 16 1250 0 0 2 0 0 1250 6 1250 6 1250 134 0 0
Sault Area Hospital 61 3 61 0 0 0 0 0 54 0 54 0 0 0 0 0 54 1 54 0 54 16 54 0
Province of Ontario 6612 1069 5005 4 4 4 10 0 4998 51 3744 0 0 3 0 48 3745 32 3745 14 3745 602 2495 6
Manitoba 1270 183 1006 0 0 2 2 2 1006 0 66 0 0 2 1 0 66 6 102 0 66 27 102 0
Saskatchewan 1341 121 614 0 0 0 0 0 599 2 233 1 2 0 0 0 233 11 233 0 233 49 233 0
Alberta 4295 524 2712 8 0 1 9 0 2560 7 797 2 4 1 0 0 797 6 797 0 791 162 797 0
Prairies 6906 828 4332 8 0 3 11 2 4165 9 1096 3 6 3 1 0 1096 23 1132 0 1090 238 1132 0
British Columbia 3102 633 2568 14 4 0 34 1 2567 9 624 5 2 2 7 0 624 13 624 1 593 120 593 1
Yukon 56 5 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 9 2 7 0 0 0 0 0 7 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 7 1 N.C. N.C.
Nunavut 84 8 58 0 0 0 0 0 58 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 149 15 92 0 0 0 0 0 92 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 7 1 N.C. N.C.
CANADA 30976 5140 17363 26 8 25 73 6 16177 124 6890 25 15 10 15 48 6908 102 6927 25 5836 1056 5646 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.

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 16, 2023 (surveillance weeks 2023-35 to 2023-37)
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 1381 227 858 0 0 0 0 0 858 6 858 1 1 1 6 0 858 11 858 2 858 195 858 3
Prince Edward Island 373 44 28 0 0 0 0 0 28 0 23 0 0 0 1 0 23 4 23 0 23 11 23 0
Nova Scotia 3131 738 1136 0 0 0 0 0 1136 1 92 5 1 0 1 0 92 3 92 1 92 22 92 0
New Brunswick 2090 300 1225 0 0 1 1 0 1195 2 145 2 1 0 1 0 145 4 145 0 145 32 145 1
Atlantic 6975 1309 3247 0 0 1 1 0 3217 9 1118 8 3 1 9 0 1118 22 1118 3 1118 260 1118 4
Région Nord-Est 3815 514 2713 0 0 3 3 0 507 4 147 2 2 0 6 0 147 1 146 5 N.C. N.C. 147 0
Québec-Chaudière-Appalaches 5317 814 1289 0 0 4 4 1 1289 23 617 4 0 1 2 0 649 34 617 8 N.C. N.C. 617 1
Centre-du-Québec 5439 1108 641 0 0 1 1 1 638 11 90 3 2 1 2 0 90 3 90 0 N.C. N.C. 90 1
Montréal-Laval 9120 1432 3448 0 0 14 14 3 3125 43 1821 19 6 7 10 0 1821 28 1822 17 N.C. N.C. 1821 9
Ouest du Québec 4047 845 1033 0 0 2 2 2 1033 20 48 2 2 1 2 0 48 3 48 2 N.C. N.C. 48 1
Montérégie 3515 702 2015 0 0 8 8 2 1852 25 17 1 0 0 0 0 17 0 17 0 N.C. N.C. 17 0
Province of Québec 31253 5415 11139 0 0 32 32 9 8444 126 2740 31 12 10 22 0 2772 69 2740 32 N.C. N.C. 2740 12
P.H.O.L. - Ottawa 1322 490 631 1 0 0 1 0 631 5 324 0 0 0 0 2 324 0 324 0 324 56 324 0
EORLA 3118 331 999 0 0 2 2 0 999 29 82 0 1 1 0 0 82 0 82 0 82 18 82 0
P.H.O.L. - Kingston 649 152 236 0 0 0 0 0 236 0 194 0 0 0 0 8 194 0 194 0 194 52 194 0
UHN / Mount Sinai Hospital 2604 143 1404 0 0 2 2 2 1404 1 59 0 0 2 0 0 59 1 59 0 59 4 59 0
P.H.O.L. - Toronto 1477 416 2254 22 6 1 20 0 2254 6 2089 0 0 0 0 72 2089 26 2087 7 2089 460 2087 5
Shared Hospital Laboratory 2615 204 2615 2 4 0 6 1 2615 39 2611 0 0 0 0 28 2611 23 2618 4 2618 200 2618 6
P.H.O.L. - Sault Ste. Marie 12 6 15 0 0 0 0 0 15 0 15 0 0 0 0 0 15 0 15 0 15 2 15 0
P.H.O.L. - Timmins 70 11 53 0 0 0 0 0 53 0 41 0 0 0 0 2 41 1 41 0 41 10 41 0
St. Joseph's - London 1088 79 75 0 0 0 0 0 75 1 75 0 0 0 0 0 75 0 75 0 75 7 75 0
P.H.O.L. - London 1021 307 695 0 0 0 0 1 695 2 542 0 0 0 0 16 542 3 542 0 542 108 542 0
P.H.O.L. - Orillia 57 7 95 0 0 0 0 0 95 1 86 0 0 0 0 2 86 1 86 0 86 24 86 0
P.H.O.L. - Thunder Bay 142 38 75 0 0 0 0 0 75 0 63 0 0 0 0 1 63 1 63 1 63 12 63 0
P.H.O.L. - Sudbury 46 19 55 0 0 0 0 0 55 0 41 0 0 0 0 0 42 0 41 0 41 12 41 0
P.H.O.L. - Hamilton 858 241 590 1 1 0 1 0 590 2 373 0 0 0 0 16 373 4 373 4 373 79 373 0
P.H.O.L. - Peterborough 101 15 121 0 0 0 0 0 121 5 111 0 0 0 0 1 111 1 111 0 111 41 111 0
St. Joseph's - Hamilton 4260 431 3575 0 0 6 6 4 3575 28 3575 0 0 7 0 0 3575 21 3575 11 3575 271 0 0
Sault Area Hospital 172 10 149 0 1 0 1 0 142 2 142 0 0 0 0 0 142 3 142 0 142 29 152 0
Province of Ontario 19612 2900 13637 26 12 11 39 8 13630 121 10423 0 1 10 0 148 10424 85 10428 27 10430 1385 6863 11
Manitoba 3698 540 2992 0 0 5 5 2 2992 0 174 0 2 2 4 0 174 16 271 0 174 65 271 1
Saskatchewan 3506 286 1569 0 0 1 1 0 1530 4 640 2 4 0 0 0 640 27 619 3 609 130 640 2
Alberta 10833 1249 7476 28 12 1 41 2 7075 13 2417 7 9 3 2 0 2417 26 2406 0 2379 371 2417 13
Prairies 18037 2075 12037 28 12 7 47 4 11597 17 3231 9 15 5 6 0 3231 69 3296 3 3162 566 3328 16
British Columbia 8394 1552 6843 73 18 5 118 3 6826 21 1804 8 5 6 19 0 1804 47 1804 4 1717 304 1717 4
Yukon 181 30 102 0 1 0 2 0 102 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 11 3 8 0 0 0 0 0 8 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 8 1 N.C. N.C.
Nunavut 208 18 159 0 0 0 0 0 159 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 400 51 269 0 1 0 2 0 269 1 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 8 1 N.C. N.C.
CANADA 84671 13302 47172 127 43 56 239 24 43983 295 19316 56 36 32 56 148 19349 292 19386 69 16435 2516 15766 47

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 15.88 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 16.59 12.74 0.42 0.23 0.03 1.59 0.35 0.87 0.03 0.01 0.00 0.19 0.04 0.12 0.77 1.06 7.59 1.37 0.38 0.65
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 18.09 21.73 27.46 33.58 27.74 31.69 1.64 3.02 5.97 3.26 1.65 2.40 1.48 2.10 0.81 2.44 1.38 1.86 0.36 1.38 0.17 1.61 0.00 0.51 0.18 0.28 0.44 0.56 0.00 0.26

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 28159 15.88 2346 20.20 10214 17.37 6856 15.53 5973 11.67 2641 16.70 129 17.05
37 2023-09-16 30976 16.59 2519 18.98 11688 18.11 6612 16.17 6906 11.99 3102 20.41 149 10.07

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 15344 0.42 0.06 1047 0.00 0.00 3650 0.19 0.03 4379 0.27 0.09 4058 0.37 0.05 2117 1.46 0.09 93 0.00 0.00
37 2023-09-16 17363 0.42 0.03 1216 0.08 0.00 4150 0.41 0.07 5005 0.20 0.00 4332 0.25 0.05 2568 1.32 0.04 92 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 14274 0.68 1047 0.57 2750 1.64 4379 0.82 3904 0.13 2101 0.24 93 0.00
37 2023-09-16 16177 0.77 1201 0.25 3154 1.65 4998 1.02 4165 0.22 2567 0.35 92 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 6243 1.47 355 1.69 868 2.19 3344 1.41 1131 0.97 545 1.65
37 2023-09-16 6890 1.64 401 2.49 1025 2.24 3744 1.36 1096 1.19 624 2.56

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 6254 1.49 355 1.97 879 2.28 3344 0.78 1131 1.95 545 3.30
37 2023-09-16 6908 1.48 401 2.00 1042 2.50 3745 0.85 1096 2.10 624 2.08

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 6260 0.37 355 0.28 867 1.38 3347 0.18 1146 0.17 545 0.37
37 2023-09-16 6927 0.36 401 0.50 1025 0.78 3745 0.37 1132 0.00 624 0.16

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 5320 14.92 355 25.35 - - 3347 12.88 1101 16.80 516 17.05
37 2023-09-16 5836 18.09 401 23.69 - - 3745 16.07 1090 21.83 593 20.24

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 5117 0.43 355 0.56 868 0.81 2209 0.09 1169 0.77 516 0.39
37 2023-09-16 5646 0.18 401 0.50 1025 0.10 2495 0.24 1132 0.00 593 0.17

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