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Respiratory Virus Report, Week 10 - ending March 9, 2024

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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 10 (week ending March 9, 2024) in Canada, participating RVDSS laboratories reported 1,950 detections of SARS-CoV-2 from 31,189 tests (6.3% positive). Among non-SARS-CoV-2 respiratory viruses, where test volumes are lower (range of 7,588 to 29,235 tests), activity of influenza is highest.

  • National SARS-CoV-2 percent positivity has been decreasing since mid-December 2023.
  • Influenza A percent positivity has decreased in recent weeks (1,676 detections; 5.7% positive) but remains higher than influenza B which is currently increasing (1,458 detections; 5.0% positive).
  • RSV percent positivity is stable (899 detections; 3.6% positive).
  • Percent positivity of all other non-SARS-CoV-2 respiratory viruses is within expected levels typical of this time of year.
  • 32/35 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 March 9, 2024 (surveillance week 2024-10)
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 457 29 325 0 0 15 15 9 325 20 325 4 1 0 1 0 325 6 325 12 325 14 325 9
Prince Edward Island 223 10 198 0 0 15 15 21 198 21 25 0 0 1 0 0 25 1 25 5 25 4 25 1
Nova Scotia 1167 118 1057 0 0 122 122 25 932 42 37 0 0 1 0 0 37 0 37 2 37 6 37 1
New Brunswick 1265 74 1246 20 2 24 46 125 1245 93 96 0 0 4 1 0 96 2 96 7 96 20 96 13
Atlantic 3112 231 2826 20 2 176 198 180 2700 176 483 4 1 6 2 0 483 9 483 26 483 44 483 24
Région Nord-Est 1447 51 1600 0 0 95 95 93 756 64 83 0 0 2 0 0 83 2 78 7 N.C. N.C. 83 9
Québec-Chaudière-Appalaches 1390 45 1852 0 0 187 187 223 1730 79 610 0 0 8 1 0 635 9 610 41 N.C. N.C. 447 31
Centre-du-Québec 2067 60 1957 0 0 215 215 112 850 38 24 0 0 1 0 0 24 1 24 5 N.C. N.C. 24 2
Montréal-Laval 1988 59 2974 1 0 255 256 77 1661 46 923 0 1 15 0 0 923 15 924 37 N.C. N.C. 923 59
Ouest du Québec 1264 53 805 0 0 71 71 34 796 30 21 0 0 2 0 0 21 2 21 1 N.C. N.C. 21 2
Montérégie 1245 57 1576 0 0 123 123 28 1575 44 9 0 0 0 0 0 9 0 9 0 N.C. N.C. 9 0
Province of Québec 9401 325 10764 1 0 946 947 567 7368 301 1670 0 1 28 1 0 1695 29 1666 91 N.C. N.C. 1507 103
P.H.O.L. - Ottawa 203 26 166 3 0 12 15 3 166 1 124 0 0 0 0 5 124 0 124 7 124 10 124 26
EORLA 803 39 496 0 0 37 37 42 496 4 45 0 0 1 0 0 45 0 45 0 45 6 45 4
P.H.O.L. - Kingston 129 6 100 1 0 9 10 1 100 0 67 0 0 0 0 4 67 0 67 0 67 7 67 15
UHN / Mount Sinai Hospital 828 28 571 0 0 10 10 4 571 9 77 0 0 3 0 0 77 0 77 1 77 3 77 5
P.H.O.L. - Toronto 538 23 943 11 8 20 38 37 943 11 838 0 0 0 0 41 838 12 838 78 838 46 838 114
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. N.R. N.R.
Shared Hospital Laboratory 1867 39 1447 22 5 11 38 49 1447 7 1434 0 0 0 0 20 1434 7 1443 27 1443 34 1443 27
P.H.O.L. - Sault Ste. Marie 5 0 13 1 0 0 1 0 13 0 13 0 0 0 0 1 13 0 13 0 13 0 13 4
P.H.O.L. - Timmins 40 15 52 2 1 1 4 0 52 0 41 0 0 0 0 0 41 0 41 2 41 3 41 3
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 372 35 323 21 11 15 39 24 323 5 271 0 0 0 0 8 271 1 271 12 271 16 271 25
P.H.O.L. - Orillia 13 4 13 0 0 0 0 0 13 0 13 0 0 0 0 2 13 0 13 0 13 0 13 1
P.H.O.L. - Thunder Bay 30 7 21 0 0 0 0 0 21 1 11 0 0 0 0 0 11 0 11 1 11 1 11 1
P.H.O.L. - Sudbury 25 0 31 4 0 0 4 0 31 1 30 0 0 0 0 3 30 0 30 0 30 0 30 11
P.H.O.L. - Hamilton 97 17 92 2 0 4 6 3 92 0 72 0 0 0 0 1 72 2 72 6 72 10 72 10
P.H.O.L. - Peterborough 50 0 60 2 0 2 4 2 60 1 42 0 0 0 0 4 42 0 42 2 42 6 42 7
St. Joseph's - Hamilton 1725 53 1649 0 0 96 96 66 1649 12 1649 0 0 31 0 0 1649 11 1649 74 1649 78 0 0
Sault Area Hospital 179 17 106 5 1 0 6 2 106 2 87 1 0 2 0 0 87 0 87 3 87 3 87 9
Province of Ontario 6904 309 6083 74 26 217 308 233 6083 54 4814 1 0 37 0 89 4814 33 4823 213 4823 223 3174 262
Manitoba 1461 182 1050 0 0 13 13 31 1050 41 94 0 0 4 0 0 94 8 114 7 94 13 114 11
Saskatchewan 1609 109 1171 0 0 7 7 126 998 53 383 3 0 6 0 0 383 7 383 21 383 26 383 21
Alberta 4737 316 4215 44 11 1 63 245 3990 127 1022 3 2 34 0 0 1022 12 967 0 1015 74 1022 47
Prairies 7807 607 6436 44 11 21 83 402 6038 221 1499 6 2 44 0 0 1499 27 1464 28 1492 113 1519 79
British Columbia 3861 472 3035 25 25 3 136 63 2918 125 951 0 1 24 2 0 951 22 951 75 905 116 905 55
Yukon 38 3 25 1 2 0 4 0 24 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.
Northwest Territories 66 3 66 0 0 0 0 13 66 21 N.C. N.C. N.C. N.C. N.C. N.C. 66 4 66 1 66 3 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 104 6 91 1 2 0 4 13 90 22 N.C. N.C. N.C. N.C. N.C. N.C. 66 4 66 1 66 3 N.C. N.C.
CANADA 31189 1950 29235 165 66 1363 1676 1458 25197 899 9417 11 5 139 5 89 9508 124 9453 434 7769 499 7588 523

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 March 9, 2024 (surveillance weeks 2023-35 to 2024-10)
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 17607 2671 12790 0 0 1280 1280 61 12790 821 12790 15 58 23 100 0 12790 221 12790 200 12790 1054 12790 286
Prince Edward Island 6417 707 3899 0 0 526 526 63 3899 330 441 3 0 1 8 0 440 25 430 11 440 116 424 18
Nova Scotia 40694 8022 27231 0 0 2304 2304 239 22391 1337 968 15 2 3 10 0 968 39 961 5 968 212 967 9
New Brunswick 30770 3705 28352 863 24 1822 2709 384 27947 1694 2481 7 4 5 27 0 2481 95 2481 47 2481 489 2481 102
Atlantic 95488 15105 72272 863 24 5932 6819 747 67027 4182 16680 40 64 32 145 0 16679 380 16662 263 16679 1871 16662 415
Région Nord-Est 48576 6924 43325 5 0 4597 4602 328 16921 1272 2144 14 12 12 16 0 2144 92 2096 73 N.C. N.C. 2144 66
Québec-Chaudière-Appalaches 57604 9212 37075 0 0 5296 5296 698 35663 2456 14262 21 9 19 13 0 14673 465 14262 373 N.C. N.C. 11835 361
Centre-du-Québec 70973 12246 32663 0 0 4156 4156 393 19926 1503 1058 15 8 15 7 0 1058 54 1058 42 N.C. N.C. 1087 39
Montréal-Laval 85751 13711 67948 5 2 6207 6214 248 44497 2702 23514 94 39 154 24 0 23514 462 23578 468 N.C. N.C. 23514 766
Ouest du Québec 47300 9936 19599 4 0 1921 1925 157 19407 1049 547 11 3 10 7 0 547 41 547 13 N.C. N.C. 547 24
Montérégie 45391 7897 35687 0 0 3004 3004 147 34622 1661 188 1 0 0 1 0 188 6 188 3 N.C. N.C. 188 3
Province of Québec 355595 59926 236297 14 2 25181 25197 1971 171036 10643 41713 156 71 210 68 0 42124 1120 41729 972 N.C. N.C. 39315 1259
P.H.O.L. - Ottawa 9824 3558 6609 272 53 155 357 18 6603 128 3963 0 0 0 0 70 3963 12 3961 57 3963 403 3961 171
EORLA 36705 4380 16798 0 0 1502 1502 197 16798 1100 1094 2 5 16 4 0 1069 11 1094 18 1094 201 1094 29
P.H.O.L. - Kingston 6850 2020 3775 126 17 93 210 4 3775 167 2655 0 0 0 0 45 2655 11 2655 10 2655 323 2655 67
UHN / Mount Sinai Hospital 31013 2955 19296 40 10 520 570 57 19296 208 1074 0 0 11 2 0 1074 1 1074 3 1074 47 1074 37
P.H.O.L. - Toronto 17583 5364 31099 1109 898 299 1662 180 31090 1035 28387 0 0 0 0 837 28394 323 28372 453 28387 2715 28372 1242
Sick Kids Hospital - Toronto 3527 292 3139 100 95 20 215 26 3139 305 3139 14 12 55 19 0 3139 77 3139 65 3139 550 3139 88
Shared Hospital Laboratory 48881 4441 41411 795 510 275 1580 238 41417 1325 41222 0 0 0 0 259 35568 300 41266 181 41311 1366 41288 447
P.H.O.L. - Sault Ste. Marie 419 186 503 49 3 16 62 0 503 44 349 0 0 0 0 5 349 1 349 0 349 21 349 33
P.H.O.L. - Timmins 1010 293 987 58 10 27 84 0 987 60 792 0 0 0 0 22 792 4 792 6 792 50 792 23
St. Joseph's - London 23380 3287 11728 0 0 873 873 89 11728 693 1722 0 0 0 0 19 1741 26 1741 11 1743 208 1741 42
P.H.O.L. - London 13436 4011 9838 456 140 155 566 64 9835 466 7833 0 0 0 0 203 7833 35 7831 69 7833 685 7831 261
P.H.O.L. - Orillia 537 142 1221 71 17 11 99 0 1218 74 1157 0 0 0 0 29 1157 15 1157 18 1157 144 1157 17
P.H.O.L. - Thunder Bay 1701 487 1033 57 0 8 37 4 1030 28 859 0 0 0 0 26 859 5 859 24 859 54 859 11
P.H.O.L. - Sudbury 654 238 771 36 1 20 57 1 769 22 529 0 0 0 0 14 530 1 529 1 529 43 529 22
P.H.O.L. - Hamilton 6660 2037 5372 136 65 87 234 27 5371 170 3997 0 0 0 0 121 3997 75 3996 68 3997 521 3996 170
P.H.O.L. - Peterborough 2111 665 2106 204 204 67 145 12 2096 221 1668 0 0 0 0 52 1668 35 1668 26 1668 277 1668 40
St. Joseph's - Hamilton 54041 5634 47744 0 0 2983 2983 426 47744 1729 47744 0 0 330 0 0 47744 300 47744 418 47744 2753 0 0
Sault Area Hospital 5326 745 3566 172 11 49 232 9 3559 191 2801 25 0 13 17 0 2752 33 2752 10 2752 242 2762 53
Province of Ontario 263658 40735 206996 3681 2034 7160 11468 1352 206958 7966 150985 41 17 425 42 1702 145284 1265 150979 1438 151046 10603 103267 2753
Manitoba 45925 6833 34609 140 11 1810 1961 184 34609 1281 2610 0 10 17 41 0 2610 115 3355 122 2610 503 3355 97
Saskatchewan 59326 7033 39927 102 8 5315 5425 942 36010 1395 12871 29 9 44 20 0 12871 256 12871 699 12871 1263 12871 282
Alberta 154231 18948 133153 11679 711 579 13041 1945 124117 5784 36649 126 89 316 3 0 36641 438 35631 26 36084 3334 36648 787
Prairies 259482 32814 207689 11921 730 7704 20427 3071 194736 8460 52130 155 108 377 64 0 52122 809 51857 847 51565 5100 52874 1166
British Columbia 107837 14770 107624 3951 716 242 8122 559 105120 5477 25254 111 165 195 164 0 25256 776 25141 902 24216 3756 24193 662
Yukon 1549 174 1000 32 15 0 58 3 991 45 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 1074 69 1013 166 6 1 173 42 1013 158 N.C. N.C. N.C. N.C. N.C. N.C. 814 42 814 8 1013 122 N.C. N.C.
Nunavut 3360 297 2331 426 30 51 507 33 2331 303 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 5983 540 4344 624 51 52 738 78 4335 506 N.C. N.C. N.C. N.C. N.C. N.C. 814 42 814 8 1013 122 N.C. N.C.
CANADA 1088043 163890 835222 21054 3557 46271 72771 7778 749212 37234 286762 503 425 1239 483 1702 282279 4392 287182 4430 244519 21452 236311 6255

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 14.40 13.40 0.69 0.18 0.04 1.60 0.11 0.67 0.06 0.02 0.00 0.28 0.00 0.14 0.58 1.12 4.43 1.34 0.38 0.61
36 2023-09-09 15.92 13.07 0.43 0.14 0.01 2.11 0.23 0.99 0.06 0.04 0.00 0.55 0.00 0.15 0.71 1.12 6.61 1.09 0.22 0.62
37 2023-09-16 16.49 12.74 0.48 0.23 0.03 1.59 0.35 0.87 0.03 0.01 0.00 0.19 0.04 0.12 0.82 1.06 7.59 1.37 0.38 0.65
38 2023-09-23 18.60 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 1.15 1.47 7.16 1.24 0.37 0.67
39 2023-09-30 19.59 14.44 0.51 0.67 0.01 2.65 0.50 1.52 0.09 0.03 0.00 0.29 0.09 0.18 1.14 2.14 8.48 1.29 0.51 0.72
40 2023-10-07 19.81 15.06 0.64 0.96 0.00 2.17 1.01 1.58 0.05 0.03 0.02 0.20 0.05 0.11 1.35 2.54 8.53 1.39 0.34 0.71
41 2023-10-14 17.55 16.59 0.49 1.42 0.03 2.66 1.05 1.56 0.03 0.01 0.03 0.36 0.03 0.16 1.80 3.65 9.54 1.74 0.58 1.03
42 2023-10-21 17.78 15.39 0.73 2.36 0.03 2.96 0.77 1.92 0.08 0.05 0.02 0.45 0.05 0.25 2.38 4.63 8.18 2.11 0.63 1.25
43 2023-10-28 17.89 15.78 1.16 5.47 0.03 5.19 0.68 2.59 0.10 0.03 0.02 0.55 0.06 0.23 3.25 6.76 8.11 2.16 0.55 1.41
44 2023-11-04 17.74 13.91 2.63 10.75 0.10 8.32 1.08 3.35 0.10 0.03 0.10 0.71 0.12 0.31 4.07 7.77 7.82 3.35 0.83 2.07
45 2023-11-11 18.17 12.43 4.93 16.19 0.07 9.83 1.18 4.19 0.14 0.04 0.06 0.97 0.22 0.44 5.12 7.68 7.03 4.43 1.29 2.71
46 2023-11-18 18.80 11.96 7.24 20.23 0.10 13.89 1.42 5.43 0.16 0.05 0.06 1.49 0.09 0.57 5.85 7.54 7.18 6.33 1.38 3.60
47 2023-11-25 19.31 11.76 8.81 24.27 0.13 15.25 1.25 6.91 0.12 0.04 0.07 2.13 0.13 0.80 6.81 6.66 8.10 8.69 1.79 4.79
48 2023-12-02 18.03 12.12 11.62 24.04 0.19 18.07 0.76 9.40 0.26 0.03 0.15 3.18 0.08 1.20 6.99 6.87 8.92 9.47 3.11 6.08
49 2023-12-09 17.53 12.61 14.74 21.12 0.23 19.13 1.43 11.34 0.29 0.06 0.05 4.21 0.19 1.60 7.38 7.29 10.09 12.26 5.40 7.54
50 2023-12-16 17.78 13.10 15.32 17.31 0.23 26.42 1.97 13.93 0.36 0.06 0.02 7.50 0.15 2.48 7.26 8.61 10.78 13.19 6.42 8.55
51 2023-12-23 16.81 14.09 16.78 12.50 0.18 28.53 2.27 16.69 0.45 0.05 0.02 10.44 0.19 3.30 7.29 9.16 8.97 15.23 7.40 9.92
52 2023-12-30 15.35 15.53 18.18 7.93 0.09 33.97 3.30 20.32 0.52 0.07 0.01 12.58 0.23 4.04 7.41 10.59 6.72 17.80 7.89 10.97
1 2024-01-06 14.51 15.03 14.49 4.54 0.08 30.93 4.58 19.59 0.60 0.07 0.00 10.34 0.22 3.87 7.10 10.34 5.26 15.62 8.37 10.84
2 2024-01-13 13.03 13.38 11.16 2.21 0.11 26.80 5.46 19.11 0.56 0.05 0.01 11.01 0.29 3.91 6.26 9.07 4.32 14.05 7.45 10.24
3 2024-01-20 11.35 12.21 10.28 1.40 0.04 28.20 9.13 18.95 0.79 0.14 0.01 12.75 0.35 4.70 6.13 8.43 3.42 15.56 7.90 10.95
4 2024-01-27 10.19 11.30 11.10 0.91 0.05 27.01 12.34 18.82 1.08 0.14 0.00 12.74 0.41 5.17 5.85 7.96 2.33 15.88 8.38 11.89
5 2024-02-03 9.34 11.51 11.28 0.76 0.03 23.66 15.78 19.15 1.48 0.28 0.01 14.84 0.41 5.77 5.91 7.15 2.19 16.33 8.77 12.14
6 2024-02-10 8.79 11.88 10.37 0.67 0.04 23.36 15.68 18.80 1.74 0.34 0.01 16.23 0.44 6.22 5.21 5.78 2.10 15.79 7.98 12.32
7 2024-02-17 8.12 11.79 9.43 0.57 0.02 24.22 15.48 18.53 2.18 0.29 0.00 17.02 0.35 6.56 4.49 5.13 2.16 15.53 8.42 11.89
8 2024-02-24 7.49 11.73 8.01 0.57 0.06 28.62 12.42 18.57 3.16 0.49 0.02 16.79 0.45 6.61 4.78 4.53 2.12 15.47 8.04 11.28
9 2024-03-02 7.07 11.18 6.76 0.63 0.12 29.30 11.04 18.13 4.04 0.70 0.00 15.45 0.74 6.25 3.81 3.70 2.50 15.62 7.59 10.52
10 2024-03-09 6.25 11.41 5.73 0.63 0.16 29.65 8.51 16.84 4.99 0.77 0.00 14.86 0.81 6.42 3.57 2.80 3.10 14.97 6.92 9.92
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 12.50 15.47 21.96 27.19 22.44 24.71 1.99 2.80 5.99 3.16 1.15 2.44 1.62 2.28 1.18 1.74 0.99 1.43 0.34 1.80 0.23 2.04 0.10 0.78 0.28 0.53 1.05 0.76 0.18 0.45
36 2023-09-09 14.85 16.22 18.59 30.69 23.30 26.31 1.49 3.21 4.93 3.31 1.35 2.32 1.52 2.18 1.15 2.85 1.42 1.87 0.39 1.81 0.24 0.84 0.10 0.48 0.42 0.38 0.62 0.38 0.12 0.22
37 2023-09-16 18.29 21.73 27.46 33.58 27.74 31.69 1.60 3.02 5.97 3.26 1.65 2.40 1.47 2.10 0.81 2.44 1.38 1.86 0.39 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 20.25 23.50 33.19 39.57 32.80 35.83 1.77 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 18.52 22.89 30.01 40.59 34.87 37.68 1.32 3.09 8.12 3.01 1.70 2.24 1.15 2.21 1.14 2.27 1.04 1.66 0.51 1.43 0.17 0.72 0.05 0.29 0.28 0.59 0.62 0.66 0.07 0.45
40 2023-10-07 17.45 19.32 26.26 41.29 33.00 35.43 1.34 3.69 8.19 3.28 1.90 2.43 1.41 1.79 1.31 2.25 1.39 1.82 0.32 1.49 0.16 0.92 0.05 0.34 0.26 0.93 0.57 1.08 0.22 0.59
41 2023-10-14 15.74 16.70 22.91 33.62 26.94 29.93 1.28 3.52 10.46 3.70 1.96 2.75 1.38 2.03 1.37 1.91 1.28 1.70 0.37 1.66 0.20 0.95 0.04 0.46 0.32 0.99 1.69 0.70 0.00 0.34
42 2023-10-21 13.12 12.95 22.16 32.62 24.54 27.86 1.59 4.22 10.01 3.89 2.64 3.21 1.43 1.65 2.54 2.39 1.47 1.86 0.46 1.58 0.15 0.89 0.15 0.40 0.17 1.16 1.07 1.18 0.20 0.49
43 2023-10-28 12.52 11.05 19.64 28.73 21.67 24.95 1.21 4.41 9.38 3.98 3.18 3.54 1.48 1.79 1.15 2.42 1.63 1.96 0.46 1.79 0.36 1.64 0.12 0.58 0.38 1.86 1.05 2.35 0.27 0.75
44 2023-11-04 10.83 10.23 21.45 23.82 16.75 21.38 1.44 4.14 10.28 4.81 2.94 3.72 1.76 2.02 1.42 2.88 1.18 2.21 0.55 1.79 0.77 1.08 0.23 0.48 0.37 2.54 2.21 2.59 0.21 0.88
45 2023-11-11 10.70 7.77 22.39 23.08 15.17 20.56 1.65 3.90 9.97 5.42 2.53 4.01 1.45 1.99 1.63 2.68 2.02 2.42 0.60 2.06 0.64 1.30 0.04 0.77 0.42 3.00 2.57 2.74 0.52 0.96
46 2023-11-18 8.64 6.93 21.37 22.77 15.28 19.24 1.39 3.97 8.29 5.72 1.62 4.14 2.03 1.87 2.51 2.90 1.99 2.52 0.79 1.89 0.99 1.43 0.18 0.81 0.65 3.54 2.99 3.32 0.46 1.25
47 2023-11-25 7.63 4.88 18.54 20.84 12.15 16.09 1.55 3.63 7.04 7.00 2.36 4.72 1.90 1.89 1.94 2.95 1.83 2.35 1.00 1.78 1.01 2.02 0.09 0.90 0.65 3.24 3.90 3.26 0.37 1.25
48 2023-12-02 6.79 4.74 16.64 16.72 12.69 13.84 1.51 3.04 5.78 6.14 3.03 4.18 2.15 1.87 1.89 3.34 1.66 2.49 0.91 1.86 1.48 1.94 0.31 1.09 0.76 3.94 4.94 4.30 1.00 2.04
49 2023-12-09 6.00 4.09 14.57 16.32 10.72 13.07 1.39 3.03 3.97 5.65 2.94 4.19 1.83 1.68 2.48 3.03 1.84 2.50 1.20 1.93 1.22 2.80 0.49 1.48 1.12 4.48 6.58 5.19 0.84 2.53
50 2023-12-16 5.90 4.58 12.40 13.85 8.43 10.91 1.46 2.98 3.23 5.95 2.54 4.22 2.00 2.29 2.72 3.13 1.49 2.42 1.31 1.92 1.08 3.32 0.46 1.68 1.47 5.13 7.26 6.04 1.54 3.16
51 2023-12-23 5.56 4.49 9.95 14.18 8.81 10.48 1.35 3.09 3.01 6.71 2.94 3.95 1.55 1.76 2.54 3.20 1.36 2.04 1.59 2.23 1.20 4.39 0.37 2.47 1.77 5.28 8.11 6.68 1.87 3.72
52 2023-12-30 4.71 4.50 7.71 14.41 6.24 9.26 1.35 3.32 2.13 5.08 2.87 3.75 1.76 1.80 1.92 2.59 1.20 1.76 1.76 2.75 1.00 3.81 0.41 2.49 2.48 4.73 10.33 6.73 2.78 4.73
1 2024-01-06 4.79 4.19 5.71 11.09 4.36 7.42 1.48 3.63 1.84 5.08 2.68 3.34 1.48 1.88 1.84 2.67 0.85 1.54 2.20 2.94 0.72 4.45 0.28 2.74 3.07 4.40 9.27 7.77 3.07 5.16
2 2024-01-13 4.43 4.71 3.98 9.55 4.31 6.79 1.17 3.24 1.19 4.12 2.46 3.05 1.25 1.87 1.13 2.15 0.87 1.37 1.65 2.61 0.38 4.76 0.42 2.69 3.20 4.01 7.46 7.89 2.84 5.45
3 2024-01-20 4.59 6.68 3.12 8.42 4.44 6.01 1.08 2.92 0.76 3.25 2.59 2.82 1.11 1.97 1.34 2.10 1.15 1.45 2.20 2.56 0.24 5.56 0.47 3.18 3.90 3.46 4.97 7.90 4.17 6.11
4 2024-01-27 4.37 8.22 2.60 9.04 4.89 6.41 1.16 2.78 0.64 3.12 1.77 2.55 1.56 2.35 1.18 1.83 1.11 1.49 2.11 2.71 0.23 5.19 0.55 3.05 5.19 2.63 3.92 7.86 3.79 6.09
5 2024-02-03 5.02 8.94 3.02 9.79 6.06 6.94 1.45 2.70 0.48 3.48 1.70 2.39 1.62 2.44 1.57 1.93 1.36 1.62 2.27 2.96 0.25 5.70 0.58 3.34 5.10 3.20 2.83 8.49 4.55 6.84
6 2024-02-10 6.26 9.97 3.86 9.89 6.16 6.98 1.56 2.68 0.51 2.89 1.57 2.19 1.84 2.14 1.44 1.74 1.25 1.51 2.54 3.73 0.42 5.57 0.65 3.48 6.80 2.64 3.01 8.57 3.48 6.75
7 2024-02-17 6.18 9.87 4.46 8.95 6.00 7.04 1.54 2.63 0.44 3.20 1.42 2.11 1.22 2.31 1.52 1.61 1.30 1.51 2.82 4.41 0.44 6.05 1.45 3.96 7.73 3.14 3.24 8.02 4.35 6.52
8 2024-02-24 6.21 9.55 6.31 8.35 5.20 6.94 1.84 2.55 0.73 3.21 1.31 2.25 1.30 2.86 1.85 2.00 1.38 1.66 3.15 4.29 0.53 5.74 1.19 4.19 8.28 3.07 3.67 8.29 4.21 6.61
9 2024-03-02 6.47 9.77 7.80 9.03 5.73 7.75 2.40 3.07 0.60 3.35 1.41 2.44 1.64 2.75 1.90 1.92 1.09 1.40 3.91 4.72 0.40 6.42 1.87 4.46 7.14 3.41 3.32 8.01 5.09 6.87
10 2024-03-09 6.42 9.42 8.24 10.16 5.53 8.08 2.64 2.77 0.68 4.18 1.19 2.69 1.30 2.79 1.98 2.23 1.50 1.78 4.59 5.05 0.51 6.74 2.26 4.94 6.89 3.71 3.86 8.34 4.28 6.99

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 25656 14.40 2110 16.92 9351 16.30 6230 12.39 5192 10.59 2651 18.03 122 11.48
36 2023-09-09 28237 15.92 2346 20.20 10215 17.37 6939 15.46 5968 11.90 2640 16.70 129 17.05
37 2023-09-16 31790 16.49 2567 18.62 11678 18.11 7337 15.66 6948 12.12 3111 20.64 149 10.07
38 2023-09-23 36264 18.60 2775 18.38 13455 20.48 8514 18.38 7969 14.23 3377 22.59 174 10.34
39 2023-09-30 40587 19.59 3126 22.65 15431 21.30 9291 17.86 8658 15.65 3895 23.59 186 12.90
40 2023-10-07 42173 19.81 3544 24.41 15684 22.19 9349 17.61 9198 15.96 4202 20.75 196 12.24
41 2023-10-14 38463 17.55 3583 20.74 12605 18.30 8426 15.27 9625 16.77 4047 19.13 177 14.69
42 2023-10-21 39350 17.78 3493 19.70 12590 18.63 9300 16.86 10040 17.16 3737 17.13 190 17.37
43 2023-10-28 37286 17.89 3095 17.74 12003 18.29 9276 19.35 9450 17.05 3262 14.87 200 17.50
44 2023-11-04 38183 17.74 2965 17.91 11975 18.42 9060 17.09 10341 18.12 3648 15.98 194 15.98
45 2023-11-11 38722 18.17 3122 20.12 11815 19.90 9607 18.24 10448 16.98 3545 14.41 185 10.81
46 2023-11-18 41432 18.80 3186 22.47 13182 20.21 10470 20.36 11134 16.80 3245 12.14 215 5.12
47 2023-11-25 42304 19.31 3490 22.35 12938 21.52 10880 22.17 11422 15.57 3385 11.96 189 6.35
48 2023-12-02 44713 18.03 3648 21.98 14100 22.18 11174 20.06 11903 12.58 3639 10.31 249 7.63
49 2023-12-09 46876 17.53 3654 20.17 14467 22.78 11644 18.67 12452 12.41 4272 10.30 387 6.98
50 2023-12-16 48215 17.78 4065 18.60 15835 23.97 12142 18.69 12089 11.16 3746 10.25 338 6.21
51 2023-12-23 48372 16.81 4353 15.81 16682 22.12 11548 18.73 11472 9.91 3952 10.55 365 9.86
52 2023-12-30 46997 15.35 4234 14.67 15739 19.65 11522 17.68 10314 9.95 4930 8.64 258 5.04
1 2024-01-06 48060 14.51 4471 12.68 15874 17.71 11545 16.83 10577 10.62 5300 9.57 293 7.17
2 2024-01-13 44189 13.03 4333 11.98 13921 14.75 11346 14.29 9475 9.91 4862 12.48 252 6.35
3 2024-01-20 38190 11.35 3750 10.64 11599 11.60 9942 12.87 8591 9.92 4141 10.92 167 4.19
4 2024-01-27 37089 10.19 3784 9.49 11052 9.79 9238 11.40 8358 8.95 4459 11.89 198 4.04
5 2024-02-03 36771 9.34 3908 8.75 10995 8.58 9011 9.75 8265 9.56 4420 10.63 172 5.81
6 2024-02-10 34740 8.79 3499 8.80 10544 7.33 8519 8.48 8042 10.12 3940 10.74 196 7.14
7 2024-02-17 35099 8.12 3185 8.92 11071 6.64 8901 7.48 8022 9.22 3722 11.04 198 7.07
8 2024-02-24 34146 7.49 3098 8.23 10925 5.10 8078 6.82 7890 8.66 3872 12.45 283 10.25
9 2024-03-02 32950 7.07 2992 7.02 10468 4.88 7465 6.28 7832 8.43 3976 11.75 217 6.45
10 2024-03-09 31189 6.25 3112 7.42 9401 3.46 6904 4.48 7807 7.78 3861 12.22 104 5.77

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 14543 0.69 0.06 984 0.00 0.00 3339 0.24 0.15 4324 0.39 0.09 3654 0.57 0.00 2158 2.46 0.00 84 2.38 0.00
36 2023-09-09 15430 0.43 0.06 1047 0.00 0.00 3649 0.19 0.03 4455 0.31 0.09 4069 0.37 0.05 2117 1.46 0.09 93 0.00 0.00
37 2023-09-16 18035 0.48 0.03 1216 0.08 0.00 4174 0.41 0.07 5145 0.29 0.00 4705 0.40 0.04 2703 1.29 0.04 92 0.00 0.00
38 2023-09-23 20121 0.51 0.02 1388 0.07 0.00 4734 0.30 0.00 5652 0.21 0.05 5325 0.62 0.02 2928 1.47 0.00 94 0.00 0.00
39 2023-09-30 21529 0.51 0.09 1403 0.14 0.07 4847 0.21 0.08 6186 0.37 0.11 5370 0.48 0.11 3598 1.36 0.06 125 0.00 0.00
40 2023-10-07 23658 0.64 0.05 1775 0.34 0.00 5628 0.37 0.04 6456 0.31 0.00 5803 0.74 0.16 3878 1.60 0.05 118 0.00 0.00
41 2023-10-14 23208 0.49 0.03 1938 0.57 0.00 4978 0.22 0.06 6283 0.30 0.00 6067 0.73 0.05 3828 0.73 0.03 114 0.00 0.00
42 2023-10-21 24067 0.73 0.08 2029 0.69 0.05 5110 0.37 0.02 6834 0.47 0.07 6370 1.13 0.13 3599 1.06 0.11 125 0.00 0.00
43 2023-10-28 23268 1.16 0.10 1979 0.96 0.00 5450 0.64 0.11 6814 0.50 0.06 5872 2.33 0.17 3039 1.45 0.10 114 0.88 0.00
44 2023-11-04 25317 2.63 0.10 1914 1.25 0.05 5705 0.63 0.07 6996 0.51 0.06 6996 6.80 0.17 3562 2.58 0.11 144 2.08 0.00
45 2023-11-11 26520 4.93 0.14 2069 2.03 0.14 5970 0.84 0.07 7240 1.22 0.07 7656 12.87 0.26 3460 3.96 0.14 125 4.00 0.00
46 2023-11-18 28583 7.24 0.16 2219 3.11 0.09 6454 1.36 0.09 7797 2.68 0.15 8734 18.14 0.26 3258 3.59 0.12 121 2.48 0.00
47 2023-11-25 29879 8.81 0.12 2521 4.60 0.04 6561 2.04 0.06 8070 2.69 0.02 9078 21.15 0.28 3517 6.43 0.09 132 15.15 0.00
48 2023-12-02 32859 11.62 0.26 2743 4.89 0.11 7199 3.78 0.15 8447 4.45 0.17 10485 24.44 0.47 3836 10.79 0.21 149 38.93 0.00
49 2023-12-09 34573 14.74 0.29 2817 9.66 0.11 8141 7.14 0.12 8466 7.08 0.21 11298 26.93 0.57 3590 13.12 0.11 261 49.81 0.00
50 2023-12-16 38612 15.32 0.36 3363 12.73 0.09 10087 11.63 0.12 9265 8.47 0.41 11116 24.56 0.71 4496 14.23 0.16 285 56.49 0.00
51 2023-12-23 40839 16.78 0.45 3820 19.08 0.31 12090 15.38 0.12 9246 11.39 0.51 10656 21.67 0.91 4747 16.64 0.29 280 40.36 0.00
52 2023-12-30 42481 18.18 0.52 3874 20.99 0.36 13501 19.37 0.07 9830 15.02 0.63 9719 17.61 1.24 5352 18.89 0.24 205 46.34 0.00
1 2024-01-06 43260 14.49 0.60 4132 17.91 0.36 13858 17.30 0.22 9869 11.67 0.54 9519 11.29 1.45 5634 14.55 0.39 248 33.47 0.00
2 2024-01-13 40232 11.16 0.56 3864 15.79 0.31 12702 15.32 0.19 9980 9.08 0.59 8490 5.94 1.33 4963 9.83 0.32 233 15.88 0.43
3 2024-01-20 35211 10.28 0.79 3422 14.23 0.94 11099 14.72 0.36 8812 8.65 0.45 7341 4.09 2.07 4397 9.71 0.34 140 5.71 0.00
4 2024-01-27 35174 11.10 1.08 3461 14.59 1.36 11277 17.65 0.28 8274 8.87 0.59 7261 2.31 2.91 4722 10.67 0.87 179 2.79 0.00
5 2024-02-03 35522 11.28 1.48 3608 14.61 2.02 12036 19.09 0.61 7738 8.30 1.02 7380 1.91 3.20 4626 8.58 1.25 134 2.24 2.99
6 2024-02-10 33996 10.37 1.74 3230 12.38 1.98 11857 18.01 1.05 7402 7.23 1.50 7229 1.77 3.28 4119 7.99 1.24 159 0.00 3.14
7 2024-02-17 33916 9.43 2.18 2882 8.78 2.74 11966 16.61 1.53 7689 7.40 1.87 7228 1.58 3.62 4006 6.81 1.40 145 1.38 11.03
8 2024-02-24 33293 8.01 3.16 2914 7.41 2.88 11748 14.22 2.63 7190 6.38 2.35 7028 1.07 5.63 4225 5.80 1.82 188 0.53 9.57
9 2024-03-02 31861 6.76 4.04 2834 7.13 4.13 11373 10.92 4.28 6453 5.83 2.88 6804 1.59 5.78 4231 5.25 1.96 166 2.41 12.65
10 2024-03-09 29235 5.73 4.99 2826 7.01 6.37 10764 8.80 5.27 6083 5.06 3.83 6436 1.29 6.25 3035 4.48 2.08 91 4.40 14.29

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 13610 0.58 969 0.00 2540 1.14 4324 0.81 3535 0.20 2158 0.32 84 1.19
36 2023-09-09 14361 0.71 1047 0.57 2750 1.64 4455 0.88 3915 0.18 2101 0.24 93 0.00
37 2023-09-16 16808 0.82 1201 0.25 3181 1.67 5138 1.01 4494 0.38 2702 0.41 92 1.09
38 2023-09-23 18782 1.15 1381 1.30 3652 2.27 5652 1.43 5075 0.37 2928 0.51 94 0.00
39 2023-09-30 20217 1.14 1392 0.79 3788 2.38 6186 1.42 5128 0.43 3598 0.56 125 0.00
40 2023-10-07 22042 1.35 1761 0.28 4333 2.75 6456 1.95 5496 0.36 3878 0.72 118 0.00
41 2023-10-14 21748 1.80 1927 0.83 3897 3.70 6281 2.48 5701 0.63 3828 1.04 114 0.00
42 2023-10-21 22479 2.38 2015 0.69 3889 4.78 6834 3.72 6017 0.58 3599 1.25 125 0.00
43 2023-10-28 21745 3.25 1970 1.78 4234 6.24 6814 4.21 5574 1.22 3039 1.74 114 0.00
44 2023-11-04 23657 4.07 1904 2.15 4506 6.88 6997 5.80 6544 1.79 3562 2.36 144 2.78
45 2023-11-11 24764 5.12 2058 2.77 4680 7.97 7241 7.62 7201 2.14 3459 3.58 125 6.40
46 2023-11-18 26517 5.85 2195 2.41 4910 10.14 7796 7.91 8237 2.87 3258 4.27 121 7.44
47 2023-11-25 27491 6.81 2363 4.70 4975 11.82 8068 8.66 8508 3.24 3445 5.28 132 11.36
48 2023-12-02 30258 6.99 2549 5.88 5533 11.46 8447 8.49 9797 3.57 3783 6.66 149 8.72
49 2023-12-09 31232 7.38 2665 7.69 5930 11.11 8465 7.40 10436 4.53 3475 9.35 261 6.90
50 2023-12-16 34607 7.26 3004 8.46 7537 9.73 9261 5.99 10173 5.17 4347 9.50 285 10.53
51 2023-12-23 35988 7.29 3258 9.45 8774 9.14 9244 4.64 9820 6.47 4615 9.36 277 6.14
52 2023-12-30 37639 7.41 3431 8.57 9849 7.53 9829 4.62 9130 8.48 5196 9.49 204 15.69
1 2024-01-06 37934 7.10 3630 9.12 9953 7.31 9871 4.03 8828 7.56 5404 9.88 248 13.71
2 2024-01-13 35286 6.26 3383 9.16 9029 6.14 9975 3.27 7930 7.65 4737 7.81 232 17.67
3 2024-01-20 30825 6.13 2936 9.91 7837 5.82 8808 2.99 6890 8.21 4214 6.76 140 20.00
4 2024-01-27 30616 5.85 3067 10.01 7786 5.48 8260 2.62 6810 6.83 4514 7.35 179 24.02
5 2024-02-03 30446 5.91 3235 9.52 7985 5.07 7736 2.12 6932 8.18 4426 7.32 132 24.24
6 2024-02-10 29075 5.21 2949 10.07 7832 4.60 7404 1.62 6794 6.74 3937 6.27 159 20.75
7 2024-02-17 29027 4.49 2610 8.12 7969 4.56 7689 1.16 6768 6.04 3846 4.91 145 27.59
8 2024-02-24 28917 4.78 2715 7.18 8169 4.55 7190 1.14 6599 6.83 4057 5.57 187 29.41
9 2024-03-02 27944 3.81 2712 6.42 8150 3.99 6454 1.26 6366 4.35 4096 4.32 166 18.07
10 2024-03-09 25197 3.57 2700 6.52 7368 4.09 6083 0.89 6038 3.66 2918 4.28 90 24.44

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 6234 1.99 362 1.38 847 3.90 3406 1.85 984 1.02 635 2.05
36 2023-09-09 6321 1.49 355 1.69 868 2.19 3420 1.43 1133 0.97 545 1.65
37 2023-09-16 7419 1.60 401 2.49 1053 2.18 3886 1.34 1326 1.06 753 2.66
38 2023-09-23 8139 1.77 430 2.79 1122 2.85 4366 1.74 1445 0.90 776 1.42
39 2023-09-30 8627 1.32 401 1.25 1117 1.88 4948 1.33 1415 1.06 746 0.94
40 2023-10-07 8791 1.34 467 3.43 1178 2.04 4850 1.20 1541 0.39 755 1.85
41 2023-10-14 8879 1.28 491 1.63 1094 1.37 4898 1.16 1638 1.04 758 2.24
42 2023-10-21 9281 1.59 498 2.21 1050 1.52 5293 1.51 1707 1.46 733 2.18
43 2023-10-28 9085 1.21 474 1.48 1063 1.98 5223 0.96 1656 0.85 669 2.69
44 2023-11-04 9496 1.44 492 2.24 1067 2.06 5215 1.00 1938 1.24 784 3.57
45 2023-11-11 9826 1.65 467 2.78 1257 1.83 5242 1.11 2076 1.35 784 5.10
46 2023-11-18 10441 1.39 500 2.20 1426 1.33 5505 1.24 2191 0.87 819 3.42
47 2023-11-25 10873 1.55 620 1.77 1442 1.04 5708 1.47 2196 1.18 907 3.53
48 2023-12-02 11676 1.51 676 2.37 1587 1.32 5967 1.39 2463 1.10 983 2.95
49 2023-12-09 11621 1.39 668 1.65 1630 1.10 6040 1.44 2537 1.14 746 2.14
50 2023-12-16 12631 1.46 730 1.92 1664 0.72 6696 1.36 2459 1.46 1082 2.96
51 2023-12-23 12648 1.35 768 1.56 1857 0.54 6421 1.46 2408 0.79 1194 3.02
52 2023-12-30 12871 1.35 709 1.55 2004 0.85 6809 1.29 2168 0.97 1181 3.13
1 2024-01-06 13435 1.48 812 1.72 2046 0.59 7059 1.60 2289 1.18 1229 2.69
2 2024-01-13 13189 1.17 924 1.73 1882 0.53 7137 1.16 2118 1.09 1128 1.95
3 2024-01-20 11421 1.08 704 1.28 1843 0.49 6099 1.18 1772 1.13 1003 1.30
4 2024-01-27 11007 1.16 834 0.72 1793 0.28 5677 1.41 1707 1.41 996 1.31
5 2024-02-03 11179 1.45 794 1.26 1833 0.55 5534 1.66 1933 1.86 1085 1.29
6 2024-02-10 10714 1.56 782 0.77 1832 0.49 5194 1.73 1937 1.55 969 3.30
7 2024-02-17 10731 1.54 619 1.29 1863 0.54 5369 1.42 1898 2.32 982 2.75
8 2024-02-24 10455 1.84 632 0.47 1825 1.59 5115 1.82 1904 2.21 979 2.55
9 2024-03-02 10355 2.40 587 1.02 1800 1.11 5094 2.85 1792 2.90 1082 2.40
10 2024-03-09 9417 2.64 483 2.69 1670 1.80 4814 2.64 1499 3.47 951 2.84

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 6238 1.62 362 1.93 851 2.70 3406 0.91 984 2.44 635 2.52
36 2023-09-09 6332 1.52 355 1.97 879 2.28 3420 0.82 1133 2.03 545 3.30
37 2023-09-16 7438 1.47 401 2.00 1071 2.43 3887 0.90 1326 1.96 753 1.86
38 2023-09-23 8149 0.93 429 1.17 1134 1.06 4365 0.62 1445 1.59 776 1.16
39 2023-09-30 8614 1.15 401 1.00 1129 2.04 4923 0.69 1415 1.63 746 2.01
40 2023-10-07 8809 1.41 467 2.36 1195 2.85 4851 0.66 1541 1.69 755 2.78
41 2023-10-14 8913 1.38 491 1.63 1111 3.42 4915 0.75 1638 1.47 758 2.11
42 2023-10-21 9286 1.43 498 1.20 1058 3.59 5292 0.76 1705 1.47 733 3.27
43 2023-10-28 9099 1.48 474 2.74 1077 3.62 5223 0.69 1656 1.63 669 2.99
44 2023-11-04 9514 1.76 492 2.03 1085 3.87 5215 1.04 1938 2.12 784 2.55
45 2023-11-11 9843 1.45 467 2.57 1274 2.98 5242 0.92 2076 1.64 784 1.40
46 2023-11-18 10452 2.03 500 4.60 1437 4.31 5505 0.94 2191 1.92 819 4.03
47 2023-11-25 10921 1.90 620 2.74 1461 3.97 5712 1.07 2195 1.50 911 3.84
48 2023-12-02 11737 2.15 676 3.25 1613 3.84 5967 1.36 2462 2.03 983 3.05
49 2023-12-09 11699 1.83 668 2.84 1652 3.75 6041 1.18 2537 1.26 746 3.62
50 2023-12-16 12719 2.00 730 2.19 1681 3.09 6696 1.78 2459 1.67 1082 2.40
51 2023-12-23 12035 1.55 768 1.82 1875 2.61 5726 0.89 2408 1.45 1194 3.02
52 2023-12-30 10983 1.76 709 2.12 2010 2.49 4852 0.80 2167 1.43 1181 4.74
1 2024-01-06 11676 1.48 812 1.11 2050 2.20 5219 0.75 2289 1.14 1229 4.15
2 2024-01-13 12085 1.25 924 1.52 1901 2.31 5943 0.59 2118 1.32 1126 2.49
3 2024-01-20 11459 1.11 704 1.56 1851 1.19 6091 0.64 1772 1.35 1003 2.89
4 2024-01-27 11062 1.56 834 2.88 1807 2.32 5675 0.78 1706 1.64 996 3.41
5 2024-02-03 11223 1.62 794 2.90 1841 2.55 5534 0.74 1933 1.55 1085 3.59
6 2024-02-10 10761 1.84 782 3.45 1852 2.59 5192 0.67 1935 1.45 969 5.88
7 2024-02-17 10779 1.22 619 1.29 1875 1.97 5369 0.60 1898 1.16 982 2.95
8 2024-02-24 10525 1.30 632 2.06 1837 2.01 5115 0.80 1904 0.89 979 2.96
9 2024-03-02 10420 1.64 587 4.26 1822 2.25 5094 0.98 1792 1.06 1082 2.87
10 2024-03-09 9508 1.30 483 1.86 1695 1.71 4814 0.69 1499 1.80 951 2.31

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 6260 0.34 362 0.00 848 1.42 3407 0.21 1008 0.10 635 0.16
36 2023-09-09 6354 0.39 355 0.28 867 1.38 3423 0.20 1164 0.26 545 0.37
37 2023-09-16 7455 0.39 401 0.50 1053 0.76 3886 0.36 1362 0.07 753 0.53
38 2023-09-23 8194 0.38 429 0.00 1124 1.07 4365 0.14 1500 0.13 776 1.42
39 2023-09-30 8680 0.51 401 0.25 1118 0.89 4948 0.36 1467 0.34 746 1.34
40 2023-10-07 8828 0.32 457 0.44 1180 0.76 4853 0.14 1583 0.32 755 0.66
41 2023-10-14 8911 0.37 484 0.00 1096 1.00 4915 0.20 1658 0.12 758 1.32
42 2023-10-21 9321 0.46 498 0.20 1050 1.33 5298 0.32 1742 0.17 733 1.09
43 2023-10-28 9083 0.46 474 0.63 1066 1.41 5200 0.31 1674 0.18 669 0.75
44 2023-11-04 9519 0.55 492 0.20 1070 1.96 5218 0.17 1955 0.61 784 1.15
45 2023-11-11 9825 0.60 467 0.21 1256 2.15 5244 0.21 2074 0.63 784 0.89
46 2023-11-18 10315 0.79 500 0.40 1426 2.38 5505 0.36 2180 0.37 704 2.56
47 2023-11-25 10921 1.00 620 0.97 1442 2.57 5715 0.44 2211 0.59 911 2.96
48 2023-12-02 11703 0.91 676 0.89 1585 2.33 5965 0.47 2458 0.49 983 2.34
49 2023-12-09 11654 1.20 668 1.20 1635 2.39 6037 0.61 2513 1.95 746 0.94
50 2023-12-16 12683 1.31 730 1.78 1669 2.52 6707 0.63 2424 1.61 1082 2.77
51 2023-12-23 12659 1.59 768 1.56 1857 2.48 6415 0.78 2361 2.50 1194 2.85
52 2023-12-30 12881 1.76 709 2.26 2006 2.14 6809 0.98 2112 2.27 1181 4.49
1 2024-01-06 13432 2.20 812 1.85 2048 2.15 7012 1.07 2254 3.99 1229 5.78
2 2024-01-13 13214 1.65 924 1.41 1887 1.59 7144 0.62 2060 3.88 1126 4.26
3 2024-01-20 11426 2.20 704 1.56 1837 2.34 6103 1.23 1741 4.19 1003 4.79
4 2024-01-27 11026 2.11 834 1.92 1793 1.78 5678 1.13 1681 4.34 996 4.82
5 2024-02-03 11160 2.27 794 2.39 1831 2.46 5534 1.36 1880 2.87 1085 5.44
6 2024-02-10 10709 2.54 782 2.94 1828 2.63 5191 1.58 1908 2.62 969 7.12
7 2024-02-17 10757 2.82 619 2.91 1864 3.70 5376 2.14 1880 1.91 982 6.62
8 2024-02-24 10425 3.15 632 3.96 1825 2.79 5114 2.62 1817 2.31 979 7.76
9 2024-03-02 10334 3.91 587 3.75 1802 4.99 5094 3.34 1726 2.49 1082 7.30
10 2024-03-09 9453 4.59 483 5.38 1666 5.46 4823 4.42 1464 1.91 951 7.89

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 5345 12.50 362 20.72 N.A. N.A. 3409 10.44 966 14.60 608 15.79
36 2023-09-09 5414 14.85 355 25.35 N.A. N.A. 3423 12.80 1119 16.80 516 17.05
37 2023-09-16 6331 18.29 401 23.69 N.A. N.A. 3887 16.08 1314 22.37 722 19.81
38 2023-09-23 6991 20.25 429 27.51 N.A. N.A. 4365 17.11 1428 25.14 747 24.63
39 2023-09-30 7479 18.52 401 26.43 N.A. N.A. 4948 15.74 1398 22.17 715 25.31
40 2023-10-07 7559 17.45 467 23.55 N.A. N.A. 4853 14.77 1515 20.99 706 23.80
41 2023-10-14 7762 15.74 491 23.01 N.A. N.A. 4915 13.77 1612 16.00 717 23.15
42 2023-10-21 8204 13.12 498 22.09 N.A. N.A. 5298 10.82 1681 13.50 695 22.16
43 2023-10-28 7977 12.52 474 16.03 N.A. N.A. 5227 9.95 1624 15.58 637 23.23
44 2023-11-04 8385 10.83 492 17.07 N.A. N.A. 5218 8.39 1916 12.21 736 20.52
45 2023-11-11 8530 10.70 467 16.70 N.A. N.A. 5244 8.68 2051 10.48 743 21.53
46 2023-11-18 8958 8.64 500 14.20 N.A. N.A. 5506 6.79 2161 8.42 779 18.87
47 2023-11-25 9428 7.63 620 11.94 N.A. N.A. 5716 5.86 2187 7.59 883 15.63
48 2023-12-02 10068 6.79 676 9.76 N.A. N.A. 5970 5.19 2427 6.47 959 15.43
49 2023-12-09 9980 6.00 668 6.74 N.A. N.A. 6046 4.50 2516 6.20 695 17.70
50 2023-12-16 11005 5.90 730 7.81 N.A. N.A. 6708 4.62 2437 4.97 1059 14.45
51 2023-12-23 10800 5.56 768 6.51 N.A. N.A. 6434 3.73 2380 5.88 1154 14.47
52 2023-12-30 10881 4.71 709 5.50 N.A. N.A. 6808 3.30 2155 4.83 1145 12.31
1 2024-01-06 11367 4.79 812 4.43 N.A. N.A. 7012 3.76 2269 5.51 1197 9.69
2 2024-01-13 11329 4.43 924 4.22 N.A. N.A. 7146 3.20 2097 5.05 1089 11.48
3 2024-01-20 9562 4.59 704 4.26 N.A. N.A. 6103 3.16 1749 6.40 968 10.02
4 2024-01-27 9212 4.37 834 4.68 N.A. N.A. 5678 3.12 1695 6.02 961 8.43
5 2024-02-03 9317 5.02 794 5.54 N.A. N.A. 5534 3.27 1918 7.66 1035 9.08
6 2024-02-10 8831 6.26 782 8.82 N.A. N.A. 5191 4.26 1909 7.54 918 12.42
7 2024-02-17 8854 6.18 619 6.30 N.A. N.A. 5376 4.35 1882 8.29 941 12.01
8 2024-02-24 8644 6.21 632 5.85 N.A. N.A. 5114 4.99 1895 7.23 945 10.69
9 2024-03-02 8537 6.47 587 6.30 N.A. N.A. 5094 4.61 1772 7.62 1041 13.74
10 2024-03-09 7769 6.42 483 9.11 N.A. N.A. 4823 4.62 1492 7.57 905 12.82

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 5054 0.28 362 0.00 847 0.47 2230 0.13 1007 0.60 608 0.16
36 2023-09-09 5195 0.42 355 0.56 868 0.81 2285 0.09 1171 0.77 516 0.39
37 2023-09-16 6174 0.23 401 0.50 1053 0.47 2636 0.23 1362 0.00 722 0.14
38 2023-09-23 6796 0.46 429 0.00 1122 0.80 2995 0.40 1503 0.40 747 0.54
39 2023-09-30 7026 0.28 401 0.00 1117 0.45 3325 0.21 1468 0.48 715 0.14
40 2023-10-07 7305 0.26 467 0.21 1178 0.08 3390 0.18 1587 0.25 683 1.02
41 2023-10-14 7435 0.32 491 0.20 1094 0.73 3461 0.12 1672 0.60 717 0.14
42 2023-10-21 7697 0.17 498 0.20 1050 0.48 3707 0.05 1747 0.23 695 0.14
43 2023-10-28 7576 0.38 473 0.42 1065 0.38 3707 0.30 1694 0.53 637 0.47
44 2023-11-04 7754 0.37 476 0.21 1067 0.28 3508 0.43 1967 0.20 736 0.82
45 2023-11-11 8119 0.42 467 0.86 1187 0.51 3607 0.28 2115 0.38 743 0.81
46 2023-11-18 8674 0.65 500 0.20 1324 0.98 3838 0.42 2233 0.99 779 0.51
47 2023-11-25 9070 0.65 620 0.65 1357 0.96 3977 0.55 2233 0.54 883 0.91
48 2023-12-02 9880 0.76 676 0.74 1518 1.05 4241 0.42 2486 0.72 959 1.88
49 2023-12-09 9440 1.12 668 1.20 1523 1.64 4007 0.57 2547 1.33 695 2.30
50 2023-12-16 10458 1.47 730 0.41 1583 1.58 4616 1.47 2470 1.58 1059 1.79
51 2023-12-23 10483 1.77 768 1.30 1765 2.10 4389 1.66 2407 1.58 1154 2.43
52 2023-12-30 10328 2.48 709 1.55 1885 2.97 4422 2.49 2167 2.08 1145 2.97
1 2024-01-06 10904 3.07 812 2.96 1861 2.10 4722 3.37 2312 2.85 1197 3.93
2 2024-01-13 10898 3.20 924 3.03 1719 2.50 5030 3.14 2136 3.93 1089 3.31
3 2024-01-20 9525 3.90 704 5.11 1698 4.18 4360 3.78 1795 3.79 968 3.20
4 2024-01-27 9111 5.19 834 5.28 1640 5.49 3941 5.76 1735 4.27 961 3.95
5 2024-02-03 9137 5.10 794 4.79 1647 5.10 3717 6.27 1944 3.34 1035 4.44
6 2024-02-10 8766 6.80 782 5.37 1653 9.50 3456 7.00 1957 5.01 918 6.21
7 2024-02-17 8846 7.73 619 6.30 1700 8.12 3661 8.96 1925 6.39 941 5.95
8 2024-02-24 8546 8.28 632 7.28 1644 10.28 3417 8.17 1908 7.02 945 8.47
9 2024-03-02 8526 7.14 587 6.47 1643 7.49 3448 8.47 1807 5.53 1041 5.38
10 2024-03-09 7588 6.89 483 4.97 1507 6.83 3174 8.25 1519 5.20 905 6.08

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