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Respiratory Virus Report, Week 39 - ending September 30, 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 39 (week ending September 30, 2023) in Canada, participating RVDSS laboratories reported 7,892 detections of SARS-CoV-2 from 40,336 tests (19.6% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 6,701 to 20,939 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, this is expected for this time of year and activity remains below expected levels (1,343 detections; 18.7% 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 30, 2023 (surveillance week 2023-39)
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 501 87 307 0 0 0 0 0 307 1 307 0 0 0 4 0 307 2 307 1 307 73 307 0
Prince Edward Island 147 21 6 0 0 0 0 0 6 0 5 0 0 0 0 0 5 0 5 0 5 2 5 0
Nova Scotia 1603 489 564 0 0 2 2 0 564 8 33 0 0 0 0 0 33 2 33 0 33 15 33 0
New Brunswick 855 111 526 0 0 0 0 1 515 2 56 1 0 0 0 0 56 0 56 0 56 16 56 0
Atlantic 3106 708 1403 0 0 2 2 1 1392 11 401 1 0 0 4 0 401 4 401 1 401 106 401 0
Région Nord-Est 1967 427 1160 0 0 0 0 1 306 8 68 1 0 0 3 0 68 4 68 0 N.C. N.C. 68 0
Québec-Chaudière-Appalaches 2732 520 594 0 0 1 1 1 594 21 285 1 0 0 0 0 296 8 285 4 N.C. N.C. 285 0
Centre-du-Québec 2525 517 366 0 0 1 1 1 364 11 20 0 0 0 0 0 20 0 20 1 N.C. N.C. 20 0
Montréal-Laval 3697 642 1255 0 0 7 7 0 1145 21 715 6 2 2 1 0 715 10 716 5 N.C. N.C. 715 5
Ouest du Québec 2370 711 546 0 0 0 0 1 543 15 17 1 1 0 2 0 17 1 17 0 N.C. N.C. 17 0
Montérégie 2140 466 918 0 0 1 1 0 828 14 4 0 0 0 0 0 4 0 4 0 N.C. N.C. 4 0
Province of Québec 15431 3283 4839 0 0 10 10 4 3780 90 1109 9 3 2 6 0 1120 23 1110 10 N.C. N.C. 1109 5
P.H.O.L. - Ottawa 287 125 177 0 0 1 1 0 177 0 114 0 0 0 0 1 114 0 114 0 114 24 114 0
EORLA 1279 148 439 0 0 0 0 1 439 26 26 0 0 0 0 0 1 0 26 0 26 5 26 0
P.H.O.L. - Kingston 405 94 145 0 0 0 0 0 145 1 132 0 0 0 0 2 132 0 132 0 132 28 132 0
UHN / Mount Sinai Hospital 1110 116 548 0 0 0 0 2 548 2 24 0 0 0 0 0 24 0 24 0 24 2 24 0
P.H.O.L. - Toronto 640 196 822 6 2 0 5 0 822 4 782 0 0 0 0 27 782 7 782 3 782 190 782 3
Shared Hospital Laboratory 1292 151 1292 3 2 0 5 1 1292 19 1294 0 0 0 0 15 1294 10 1294 1 1294 113 1294 1
P.H.O.L. - Sault Ste. Marie 42 32 42 0 0 0 0 0 42 0 11 0 0 0 0 0 11 0 11 0 11 1 11 0
P.H.O.L. - Timmins 23 8 18 0 0 0 0 0 18 1 18 0 0 0 0 3 18 0 18 0 18 0 18 0
St. Joseph's - London 862 146 60 0 0 0 0 0 60 0 59 0 0 0 0 1 59 0 59 0 59 13 59 1
P.H.O.L. - London 621 229 402 0 0 0 0 0 402 4 333 0 0 0 0 5 333 1 333 0 333 65 333 0
P.H.O.L. - Orillia 12 1 39 1 0 1 2 0 39 0 39 0 0 0 0 0 39 0 39 2 39 7 39 0
P.H.O.L. - Thunder Bay 80 30 37 0 0 0 0 0 37 0 21 0 0 0 0 0 21 0 21 0 21 4 21 0
P.H.O.L. - Sudbury 17 4 9 0 0 0 0 0 9 0 9 0 0 0 0 0 9 1 9 0 9 3 9 0
P.H.O.L. - Hamilton 327 95 256 0 0 0 0 0 256 6 182 0 0 0 0 3 182 3 182 1 182 56 182 0
P.H.O.L. - Peterborough 117 44 84 0 0 0 0 1 84 1 74 0 0 0 0 3 74 2 74 1 74 26 74 0
St. Joseph's - Hamilton 1907 198 1623 0 0 2 2 1 1623 17 1623 0 0 5 0 0 1623 10 1623 8 1623 217 0 0
Sault Area Hospital 126 26 78 0 0 0 0 0 78 0 78 0 0 0 0 0 78 0 78 0 78 18 78 0
Province of Ontario 9147 1643 6071 10 4 4 15 6 6071 81 4819 0 0 5 0 60 4794 34 4819 16 4819 772 3196 5
Manitoba 1714 335 1265 0 0 0 0 2 1265 1 68 0 1 2 3 0 68 4 121 0 68 35 121 1
Saskatchewan 1855 245 722 0 0 1 1 2 703 6 308 0 0 0 0 0 308 8 308 5 308 76 308 1
Alberta 5098 758 3034 21 0 1 22 2 2847 13 861 3 3 2 0 0 861 10 860 0 853 165 861 4
Prairies 8667 1338 5021 21 0 2 23 6 4815 20 1237 3 4 4 3 0 1237 22 1289 5 1229 276 1290 6
British Columbia 3891 911 3588 16 3 0 49 2 3588 20 736 2 1 1 3 0 736 15 736 10 705 180 705 1
Yukon 71 5 N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. 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 23 4 17 0 0 0 0 0 17 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 17 9 N.C. N.C.
Nunavut N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. N.R. 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 94 9 17 0 0 0 0 0 17 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 17 9 N.C. N.C.
CANADA 40336 7892 20939 47 7 18 99 19 19663 222 8302 15 8 12 16 60 8288 98 8355 42 7171 1343 6701 17

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 30, 2023 (surveillance weeks 2023-35 to 2023-39)
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 2347 380 1464 0 0 0 0 0 1464 9 1464 1 3 1 15 0 1464 17 1464 3 1464 342 1464 3
Prince Edward Island 609 75 40 0 0 0 0 0 40 0 34 0 0 0 1 0 33 4 33 0 33 16 33 0
Nova Scotia 6058 1554 2249 0 0 3 3 0 2249 19 177 9 1 1 1 0 177 6 177 1 177 57 177 0
New Brunswick 3785 518 2285 0 0 1 1 1 2237 10 274 3 1 0 1 0 274 4 274 0 274 69 274 1
Atlantic 12799 2527 6038 0 0 4 4 1 5990 38 1949 13 5 2 18 0 1948 31 1948 4 1948 484 1948 4
Région Nord-Est 7461 1255 5018 0 0 4 4 1 1096 15 281 4 2 0 10 0 281 5 280 6 N.C. N.C. 281 0
Québec-Chaudière-Appalaches 10495 1836 2389 0 0 10 10 2 2389 61 1128 5 1 1 5 0 1184 48 1128 14 N.C. N.C. 1128 1
Centre-du-Québec 10278 2165 1423 0 0 2 2 2 1418 34 141 6 2 1 2 0 141 3 141 3 N.C. N.C. 141 1
Montréal-Laval 16275 2615 6115 0 0 25 25 3 5568 94 3336 38 11 12 13 0 3336 43 3340 29 N.C. N.C. 3336 27
Ouest du Québec 8340 2068 2018 0 0 6 6 3 2014 43 86 5 3 1 4 0 86 5 86 2 N.C. N.C. 86 1
Montérégie 7280 1513 3772 0 0 9 9 2 3418 53 27 1 0 0 0 0 27 0 27 0 N.C. N.C. 27 0
Province of Québec 60129 11452 20735 0 0 56 56 13 15903 300 4999 59 19 15 34 0 5055 104 5002 54 N.C. N.C. 4999 30
P.H.O.L. - Ottawa 1972 757 1042 1 0 1 2 0 1042 7 566 0 0 0 0 3 566 0 566 0 566 97 566 0
EORLA 5571 589 1855 0 0 3 3 1 1855 76 139 0 1 1 0 0 114 0 139 0 139 32 139 0
P.H.O.L. - Kingston 1432 365 536 0 0 0 0 0 536 1 438 0 0 0 0 14 438 0 438 0 438 104 438 1
UHN / Mount Sinai Hospital 4660 345 2481 0 0 2 2 4 2481 3 113 0 0 2 0 0 113 1 113 0 113 9 113 0
P.H.O.L. - Toronto 2831 830 4005 36 12 1 31 0 4005 16 3709 0 0 0 0 125 3709 40 3706 13 3709 859 3706 14
Shared Hospital Laboratory 4916 474 4916 6 9 0 15 2 4917 74 4914 0 0 0 0 54 4913 41 4920 5 4920 391 4920 10
P.H.O.L. - Sault Ste. Marie 81 60 86 0 0 0 0 0 86 0 40 0 0 0 0 0 40 0 40 0 40 7 40 0
P.H.O.L. - Timmins 118 25 89 0 0 0 0 0 89 1 77 0 0 0 0 8 77 1 77 0 77 13 77 0
St. Joseph's - London 3337 394 256 0 0 0 0 0 256 1 255 0 0 0 0 3 255 2 255 0 255 52 255 1
P.H.O.L. - London 2187 708 1422 0 0 0 0 1 1422 7 1141 0 0 0 0 33 1141 5 1141 0 1141 241 1141 0
P.H.O.L. - Orillia 89 11 162 1 0 1 2 0 161 2 150 0 0 0 0 3 150 2 150 2 150 36 150 0
P.H.O.L. - Thunder Bay 294 101 142 0 0 0 0 0 142 0 114 0 0 0 0 2 114 1 114 1 114 25 114 0
P.H.O.L. - Sudbury 77 26 80 0 0 0 0 0 80 0 66 0 0 0 0 0 67 1 66 0 66 17 66 0
P.H.O.L. - Hamilton 1577 453 1104 1 1 0 1 0 1104 9 740 0 0 0 0 26 740 8 740 6 740 201 740 1
P.H.O.L. - Peterborough 336 116 282 0 0 0 0 1 282 9 253 0 0 0 0 6 253 3 253 1 253 89 253 1
St. Joseph's - Hamilton 7921 874 6568 0 0 10 10 8 6568 66 6568 0 0 18 0 0 6568 37 6568 21 6568 680 0 0
Sault Area Hospital 387 48 299 0 1 0 1 0 292 2 292 0 0 0 0 0 292 4 292 0 292 67 302 0
Province of Ontario 37786 6176 25325 45 23 18 67 17 25318 274 19575 0 1 21 0 277 19550 146 19578 49 19581 2920 13020 28
Manitoba 7036 1204 5457 0 0 8 8 5 5457 16 329 0 4 4 11 0 329 23 537 0 329 144 537 2
Saskatchewan 7037 697 3143 0 0 8 8 2 3068 15 1333 3 4 0 4 0 1333 49 1312 10 1283 303 1333 4
Alberta 20540 2625 14147 75 15 4 94 4 13282 39 4513 12 14 5 2 0 4513 45 4498 0 4444 793 4513 22
Prairies 34613 4526 22747 75 15 20 110 11 21807 70 6175 15 22 9 17 0 6175 117 6347 10 6056 1240 6383 28
British Columbia 15670 3235 13494 130 30 6 211 5 13477 58 3445 13 9 8 30 0 3445 72 3445 28 3298 691 3298 9
Yukon 311 42 129 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 63 8 47 0 0 0 0 0 47 0 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 47 18 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 668 82 380 0 1 0 2 0 380 1 N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. 47 18 N.C. N.C.
CANADA 161665 27998 88719 250 69 104 450 47 82875 741 36143 100 56 55 99 277 36173 470 36320 145 30930 5353 29648 99

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 16.53 12.74 0.46 0.23 0.03 1.59 0.35 0.87 0.03 0.01 0.00 0.19 0.04 0.12 0.81 1.06 7.59 1.37 0.38 0.65
38 2023-09-23 18.64 13.62 0.51 0.48 0.00 2.15 0.43 1.17 0.02 0.02 0.00 0.21 0.00 0.14 1.11 1.47 7.16 1.24 0.37 0.67
39 2023-09-30 19.57 14.44 0.47 0.67 0.01 2.65 0.50 1.52 0.09 0.03 0.00 0.29 0.09 0.18 1.13 2.14 8.48 1.29 0.51 0.72
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 0.23 0.28 0.44 0.56 0.00 0.26
38 2023-09-23 20.23 23.50 33.19 39.57 32.80 35.83 1.76 2.42 4.73 2.87 1.92 2.33 0.93 1.58 0.82 2.04 1.11 1.63 0.38 1.61 0.37 1.43 0.06 0.48 0.46 0.32 0.67 1.36 0.06 0.43
39 2023-09-30 18.73 22.89 30.01 40.59 34.87 37.68 1.34 3.09 8.12 3.01 1.70 2.24 1.18 2.21 1.14 2.27 1.04 1.66 0.50 1.43 0.17 0.72 0.05 0.29 0.25 0.59 0.62 0.66 0.07 0.45

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 31620 16.53 2519 18.98 11678 18.11 7254 15.78 6909 12.03 3111 20.64 149 10.07
38 2023-09-23 36008 18.64 2718 18.76 13454 20.48 8385 18.57 7900 13.97 3377 22.59 174 12.64
39 2023-09-30 40336 19.57 3106 22.79 15431 21.28 9147 17.96 8667 15.44 3891 23.41 94 9.57

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 17959 0.46 0.03 1216 0.08 0.00 4174 0.41 0.07 5074 0.22 0.00 4700 0.38 0.04 2703 1.29 0.04 92 0.00 0.00
38 2023-09-23 20011 0.51 0.02 1388 0.07 0.00 4734 0.30 0.00 5548 0.22 0.05 5319 0.62 0.02 2928 1.47 0.00 94 0.00 0.00
39 2023-09-30 20939 0.47 0.09 1403 0.14 0.07 4839 0.21 0.08 6071 0.25 0.10 5021 0.46 0.12 3588 1.37 0.06 17 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 16732 0.81 1201 0.25 3181 1.67 5067 1.01 4489 0.38 2702 0.41 92 0.00
38 2023-09-23 18672 1.11 1381 1.30 3652 2.27 5548 1.30 5069 0.37 2928 0.51 94 0.00
39 2023-09-30 19663 1.13 1392 0.79 3780 2.38 6071 1.33 4815 0.42 3588 0.56 17 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 7336 1.62 401 2.49 1053 2.18 3815 1.36 1314 1.07 753 2.66
38 2023-09-23 8077 1.76 430 2.79 1122 2.85 4262 1.74 1487 0.87 776 1.42
39 2023-09-30 8302 1.34 401 1.25 1109 1.80 4819 1.35 1237 1.13 736 0.95

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 7355 1.45 401 2.00 1071 2.43 3816 0.86 1314 1.98 753 1.86
38 2023-09-23 8087 0.93 429 1.17 1134 1.06 4261 0.61 1487 1.55 776 1.16
39 2023-09-30 8288 1.18 401 1.00 1120 2.05 4794 0.71 1237 1.78 736 2.04

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 8132 0.38 429 0.00 1124 1.07 4261 0.14 1542 0.13 776 1.42
39 2023-09-30 8355 0.50 401 0.25 1110 0.90 4819 0.33 1289 0.39 736 1.36

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 6229 18.43 401 23.69 - - 3816 16.27 1283 22.45 722 19.81
38 2023-09-23 6929 20.23 429 27.51 - - 4261 17.46 1470 23.67 747 24.63
39 2023-09-30 7171 18.73 401 26.43 - - 4819 16.02 1229 22.46 705 25.53

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 0.23 401 0.50 1053 0.47 2565 0.23 1350 0.00 722 0.14
38 2023-09-23 6734 0.46 429 0.00 1122 0.80 2891 0.42 1545 0.39 747 0.54
39 2023-09-30 6701 0.25 401 0.00 1109 0.45 3196 0.16 1290 0.47 705 0.14

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