FluWatch report: November 20 to November 26, 2022 (week 47)

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Organization: Public Health Agency of Canada

Published: 2022-12-02

Weekly Highlights

  • At the national level, influenza activity has continued to increase steeply as we enter the fifth week of the national influenza epidemic. All surveillance indicators are increasing and all are above expected levels typical of this time of year.

Virologic

  • In week 47, a total of 8,242 laboratory detections (8,226 influenza A and 16 influenza B) were reported.
  • Among subtyped influenza A detections in week 47, 95% (2,214) were influenza A(H3N2) and 5% (119) were influenza A(H1N1).
  • Among detections for which age information was reported in week 47 (5,096), 2,339 (46%) of detections were in individuals aged 0-19 years old.

Syndromic

  • The percentage of visits for influenza-like illness (ILI) was 3.1% in week 47. The percentage visits for ILI is above levels typical of this time of year.
  • The percentage of FluWatchers reporting fever and cough was 3.1% in week 47. The percentage of FluWatchers reporting cough and fever is above levels typical of this time of year.

Outbreaks

  • From August 28, 2022 to November 26, 2022 (weeks 35 to 47), 198 laboratory-confirmed influenza outbreaks have been reported.

Severe Outcomes

  • The IMPACT network continues to report elevated weekly numbers of influenza-associated hospitalizations among the pediatric population. Currently, the weekly number of pediatric hospitalizations being reported is above levels typically seen at the peak of the influenza season. In week 47, 223 influenza-associated hospitalizations were reported.
  • The highest cumulative hospitalization rates are among children under 5 years of age (41/100,000 population) and adults 65 years of age and older 33/100,000 population).

On this page

Influenza/Influenza-like Illness Activity - Geographic Spread

In week 47, almost all regions in Canada reported influenza activity with six regions in three provinces (P.E.I., Alta., and B.C.) reporting widespread activity (Figure 1).

Figure 1 - Map of influenza/ILI activity by province and territory, Canada, week 2022-46

Number of Regions Reporting in Week 47: 53 out of 53

Figure 1. Text version below
Figure 1 - Text description
Province Influenza Surveillance Region Activity Level
N.L. Eastern Sporadic
N.L. Labrador-Grenfell Sporadic
N.L. Central Localized
N.L. Western Sporadic
P.E.I. Prince Edward Island Widespread
N.S. Zone 1 - Western Sporadic
N.S. Zone 2 - Northern Sporadic
N.S. Zone 3 - Eastern Sporadic
N.S. Zone 4 - Central Sporadic
N.B. Region 1 Localized
N.B. Region 2 Localized
N.B. Region 3 Localized
N.B. Region 4 Localized
N.B. Region 5 Sporadic
N.B. Region 6 Sporadic
N.B. Region 7 Localized
Que. Nord-est Sporadic
Que. Québec et Chaudieres-Appalaches Sporadic
Que. Centre-du-Québec Sporadic
Que. Montréal et Laval Sporadic
Que. Ouest-du-Québec Sporadic
Que. Montérégie Sporadic
Ont. Central East Localized
Ont. Central West Localized
Ont. Eastern Localized
Ont. North East Localized
Ont. North West Sporadic
Ont. South West Localized
Ont. Toronto Localized
Man. Northern Regional No Activity
Man. Prairie Mountain Sporadic
Man. Interlake-Eastern Sporadic
Man. Winnipeg Sporadic
Man. Southern Health Sporadic
Sask. North Sporadic
Sask. Central Localized
Sask. South Localized
Alta. North Zone Widespread
Alta. Edmonton Localized
Alta. Central Zone Widespread
Alta. Calgary Widespread
Alta. South Zone Widespread
B.C. Interior Widespread
B.C. Fraser Localized
B.C. Vancouver Coastal Sporadic
B.C. Vancouver Island Localized
B.C. Northern Sporadic
Y.T. Yukon Localized
N.W.T. North Sporadic
N.W.T. South Sporadic
Nvt. Qikiqtaaluk Sporadic
Nvt. Kivalliq Sporadic
Nvt. Kitimeot No Activity

Laboratory-Confirmed Influenza Detections

In week 47, a total of 8,242 laboratory detections (8,226 influenza A and 16 influenza B) were reported.

The following results were reported from sentinel laboratories across Canada in week 47 (Figures 2 and 3):

To date this season (August 28, 2022 to November 26, 2022):

For more detailed weekly and cumulative influenza data, see the text descriptions for Figures 2 and 3 or the Respiratory Virus Detections in Canada Report.

Figure 2 - Number of positive influenza tests and percentage of tests positive, by type, subtype and report week, Canada, week 2022-35 to 2022-47

Number of Laboratories Reporting in Week 47: 33 out of 35

Figure 2. Text version below
Figure 2 - Text description
Surveillance Week A(Unsubtyped) A(H3N2) A(H1N1) Influenza B Percent Positive A Percent Positive B
35 12 10 2 3 0.2 0.0
36 9 5 1 5 0.1 0.0
37 19 9 3 2 0.2 0.0
38 26 35 20 3 0.5 0.0
39 44 53 22 5 0.7 0.0
40 63 66 16 4 1.0 0.0
41 120 110 20 1 1.5 0.0
42 214 204 11 9 2.4 0.1
43 407 595 23 6 5.6 0.0
44 995 1351 54 7 10.9 0.0
45 1829 2268 69 11 15.9 0.0
46 3152 2891 96 16 19.8 0.1
47 5424 2214 119 16 23.1 0.0
Figure 3 - Percentage of tests positive in Canada compared to previous seasons, week 2022-35 to 2022-47
Figure 3. Text version below.

The shaded area represents the maximum and minimum number of influenza tests or percentage of tests positive reported by week from seasons 2014-2015 to 2019-2020. Data from week 11 of the 2019-2020 season onwards are excluded from the historical comparison due to the COVID-19 pandemic.

The epidemic threshold is 5% tests positive for influenza. When it is exceeded, and a minimum of 15 weekly influenza detections are reported, a seasonal influenza epidemic is declared.

Figure 3 - Text description
Surveillance Week Percentage of tests positive, 2022-2023 Percentage of tests positive, 2021-2022 Percentage of tests positive, 2020-2021 Maximum Percentage of Tests Positive Minimum Percentage of Tests Positive Average Percentage of Tests Positive
35 0.2 0.0 0.0 1.9 0.1 0.8
36 0.2 0.0 0.0 2.3 0.3 1.1
37 0.3 0.0 0.0 1.8 0.4 1.0
38 0.5 0.0 0.0 2.4 0.5 1.3
39 0.7 0.0 0.0 2.9 0.7 1.7
40 1.0 0.0 0.0 2.3 1.1 1.7
41 1.5 0.1 0.0 3.0 1.3 1.7
42 2.5 0.1 0.0 3.4 0.9 2.2
43 5.6 0.1 0.0 5.3 0.8 2.8
44 10.9 0.2 0.1 8.5 1.2 3.7
45 16.0 0.1 0.0 10.1 1.4 4.6
46 19.9 0.2 0.0 14.1 1.5 6.1
47 23.1 0.2 0.1 15.4 1.4 7.7

Figure 4 - Proportion of positive influenza specimens by type or subtype and age-group reported through case-based laboratory reporting, Canada, week 2022-35 to 2022-47

Figure 4. Text version below.

Laboratory data notes:

Testing for influenza and other respiratory viruses has been influenced by the current COVID-19 pandemic. Changes in laboratory testing practices may affect the comparability of data to previous seasons.

Due to different testing protocols of laboratories across Canada, some influenza A subtype detection counts may not be included in total influenza A detection counts and percent positivity calculations.

Figure 4 - Text description
a) Proportion of influenza A and B by age-group
Age Group Proportion of Influenza A Proportion of Influenza B Total Number Influenza Detections
0 to 4 99.6% 0.4% 2610
5 to 19 99.8% 0.2% 4692
20 to 44 99.4% 0.6% 2683
45 to 64 99.8% 0.2% 1539
65+ 99.7% 0.3% 2861
b) Proportion of subtyped influenza A(H1N1) and A(H3N2) by age-group
Age Group Proportion of A(H1N1) Proportion of A(H3N2) Total Number of Subtyped Influenza Detections
0 to 4 2.7% 97.3% 1654
5 to 19 3.0% 97.0% 2512
20 to 44 4.8% 95.2% 1472
45 to 64 7.4% 92.6% 833
65+ 5.6% 94.4% 1600

Syndromic / Influenza-like Illness Surveillance

Healthcare Practitioners Sentinel Surveillance

In week 47, 3.1% of visits to healthcare professionals were due to influenza-like illness (ILI) (Figure 5). The percentage of visits for ILI is above expected levels for this time of year.

ILI symptoms are not specific to any one respiratory pathogen and can be due to influenza, or other respiratory viruses, including respiratory syncytial virus and SARS-CoV-2, the virus that causes COVID-19.

This indicator should be interpreted with caution as there have been changes in healthcare seeking behavior of individuals and a smaller number of sentinels reporting compared to previous seasons.

Figure 5 - Percentage of visits for ILI reported by sentinels by report week, Canada, weeks 2022-35 to 2022-47

Number of Sentinels Reporting in Week 47: 37

Figure 5. Text version below.

The shaded area represents the maximum and minimum percentage of percentage of participants reporting cough and fever by week, from seasons 2014-2015 to 2019-2020. Data from week 11 of the 2019-2020 season onwards are excluded from the historical comparison due to the COVID-19 pandemic.

Figure 5 - Text description
Surveillance Week 2022-2023 2021-2022 2020-2021 Average Min Max
35 0.6% 0.6% 0.1% 0.6% 0.4% 0.9%
36 0.9% 1.2% 0.2% 0.6% 0.4% 0.9%
37 0.7% 0.6% 0.4% 0.7% 0.5% 1.0%
38 0.8% 0.9% 0.3% 0.7% 0.6% 1.0%
39 1.0% 1.0% 0.4% 0.9% 0.5% 1.2%
40 0.7% 0.5% 0.2% 1.2% 0.8% 1.7%
41 1.9% 1.1% 0.4% 1.7% 0.8% 2.8%
42 1.4% 1.2% 0.5% 1.6% 1.2% 2.1%
43 1.6% 0.9% 0.3% 1.2% 0.8% 1.7%
44 1.5% 0.6% 0.3% 1.2% 0.7% 1.7%
45 2.2% 1.0% 0.4% 1.2% 0.9% 1.5%
46 2.3% 0.9% 0.8% 1.4% 1.2% 1.8%
47 3.1% 0.7% 0.3% 1.6% 1.1% 2.2%

FluWatchers

In week 47, 10,718 participants reported to FluWatchers, of which 3.1% reported symptoms of cough and fever (Figure 6). The percentage of FluWatchers who have reported cough and fever remains above expected levels typical of this time of year.

The reports of cough and fever are not specific to any one respiratory pathogen and can be due to influenza, or other respiratory viruses, including respiratory syncytial virus, rhinovirus, and SARS-CoV-2, the virus that causes COVID-19. FluWatchers reporting is not impacted by changes in health services or health seeking behaviours.

Among the 330 participants who reported cough and fever:

The Northwest Territories had the highest participation rate this week (53 participants per 100,000 population) and the neighbourhood with postal code, K0A had the highest number of participants (147). See what is happening in your neighbourhood! Downloadable datasets are also available on Open Maps.

If you are interested in becoming a FluWatcher, sign up today.

Figure 6 - Percentage of FluWatchers reporting cough and fever, Canada, week 2022-35 to 2022-47

Number of Participants Reporting in Week 47: 10,718

Figure 6. Text version below.

The shaded area represents the maximum and minimum percentage of percentage of participants reporting cough and fever by week, from seasons 2014-2015 to 2019-2020. Data from week 11 of the 2019-2020 season onwards are excluded from the historical comparison due to the COVID-19 pandemic.

Figure 6 - Text description
Surveillance Week 2022-2023 2021-2022 2020-2021 Average Min Max
35 1.3% 0.2% 0.2% N/A N/A N/A
36 1.2% 0.3% 0.2% N/A N/A N/A
37 1.6% 0.5% 0.4% N/A N/A N/A
38 1.8% 0.5% 0.3% N/A N/A N/A
39 2.3% 0.5% 0.4% N/A N/A N/A
40 2.4% 0.6% 0.5% 2.5% 2.2% 2.7%
41 2.0% 0.5% 0.4% 2.2% 1.8% 2.6%
42 2.0% 0.4% 0.3% 1.8% 1.6% 2.0%
43 2.3% 0.5% 0.2% 1.9% 1.5% 2.2%
44 2.6% 0.5% 0.3% 1.6% 1.4% 1.8%
45 3.0% 0.5% 0.3% 1.8% 1.4% 2.3%
46 2.9% 0.4% 0.3% 1.8% 1.2% 2.2%
47 3.1% 0.6% 0.3% 1.9% 1.4% 2.4%
48 N/A 0.5% 0.3% 2.4% 1.7% 3.4%
49 N/A 0.4% 0.2% 2.6% 2.0% 3.2%
50 N/A 0.6% 0.1% 2.9% 2.1% 3.8%
51 N/A 1.0% 0.2% 3.2% 2.5% 3.9%
52 N/A 1.5% 0.1% 4.0% 2.8% 5.4%
1 N/A 1.1% 0.1% 3.8% 2.9% 4.8%
2 N/A 1.0% 0.2% 2.9% 1.9% 3.9%
3 N/A 0.8% 0.1% 3.3% 2.3% 4.8%
4 N/A 0.6% 0.1% 3.1% 2.1% 4.2%
5 N/A 0.6% 0.2% 3.2% 2.6% 3.6%
6 N/A 0.5% 0.1% 3.5% 2.8% 4.3%
7 N/A 0.4% 0.2% 3.2% 2.6% 3.8%
8 N/A 0.5% 0.1% 3.1% 2.5% 3.6%
9 N/A 0.5% 0.1% 2.8% 2.4% 3.5%
10 N/A 0.6% 0.2% 2.6% 2.1% 3.1%
11 N/A 0.9% 0.2% 2.3% 1.9% 2.6%
12 N/A 1.2% 0.2% 2.6% 2.5% 2.8%
13 N/A 1.8% 0.2% 2.5% 2.0% 3.1%
14 N/A 2.3% 0.2% 2.1% 1.3% 2.6%
15 N/A 1.9% 0.2% 1.8% 1.6% 1.9%
16 N/A 1.9% 0.1% 2.0% 1.5% 2.4%
17 N/A 1.6% 0.2% 1.7% 1.4% 2.3%
18 N/A 1.4% 0.2% 1.5% 1.2% 2.1%
19 N/A 1.3% 0.1% N/A N/A N/A
20 N/A 1.2% 0.2% N/A N/A N/A
21 N/A 1.2% 0.1% N/A N/A N/A
22 N/A 1.2% 0.1% N/A N/A N/A
23 N/A 1.2% 0.1% N/A N/A N/A
24 N/A 1.3% 0.1% N/A N/A N/A
25 N/A 1.3% 0.1% N/A N/A N/A
26 N/A 1.8% 0.2% N/A N/A N/A
27 N/A 2.0% 0.1% N/A N/A N/A
28 N/A 1.9% 0.2% N/A N/A N/A
29 N/A 1.8% 0.2% N/A N/A N/A
30 N/A 1.6% 0.2% N/A N/A N/A
31 N/A 1.3% 0.2% N/A N/A N/A
32 N/A 1.2% 0.3% N/A N/A N/A
33 N/A 1.4% 0.3% N/A N/A N/A
34 N/A 1.3% 0.5% N/A N/A N/A

Influenza Outbreak Surveillance

In week 47, 44 laboratory-confirmed influenza outbreaks were reported in Canada (22 in long-term care facilities (LTC), 12 in facilities categorized as ‘other’, and 10 in acute care facilities). All outbreaks were due to influenza A. 71 ILI outbreaks were reported in schools/daycares.

To date this season (August 28, 2022 to November 26, 2022):

Outbreaks of ILI are not specific to any one respiratory pathogen and can be due influenza, or other respiratory viruses, including respiratory syncytial virus, rhinovirus, COVID-19, or a mixture of viruses. Many respiratory viruses in addition to the flu commonly circulate during the fall and winter, and can cause clusters of cases with respiratory illness which could be captured as ILI.

Number of provinces and territoriesFootnote 1 reporting in week 47: 12 out of 13

Figure 7: Number of new outbreaks of laboratory-confirmed influenza by report week, Canada, weeks 2022-35 to 2022-47

Figure 7. Text version below.

Figure 7 - Text description
Surveillance Week Acute Care Facilities Long Term Care Facilities Other Schools and Daycares Remote and/or Isolated Communities
35 0 0 1 0 0
36 0 1 0 0 0
37 0 0 0 0 0
38 1 0 0 0 0
39 0 2 1 0 0
40 0 2 3 0 0
41 1 2 1 0 0
42 3 1 2 0 0
43 1 7 7 3 0
44 1 10 11 1 0
45 12 12 6 0 0
46 14 30 18 0 0
47 10 22 12 0 0
48 0 0 0 0 0
49 0 0 0 0 0
50 0 0 0 0 0
51 0 0 0 0 0
52 0 0 0 0 0
1 0 0 0 0 0
2 0 0 0 0 0
3 0 0 0 0 0
4 0 0 0 0 0
5 0 0 0 0 0
6 0 0 0 0 0
7 0 0 0 0 0
8 0 0 0 0 0
9 0 0 0 0 0
10 0 0 0 0 0
11 0 0 0 0 0
12 0 0 0 0 0
13 0 0 0 0 0
14 0 0 0 0 0
15 0 0 0 0 0
16 0 0 0 0 0
17 0 0 0 0 0
18 0 0 0 0 0
19 0 0 0 0 0
20 0 0 0 0 0
21 0 0 0 0 0
22 0 0 0 0 0
23 0 0 0 0 0
24 0 0 0 0 0
25 0 0 0 0 0
26 0 0 0 0 0
27 0 0 0 0 0
28 0 0 0 0 0
29 0 0 0 0 0
30 0 0 0 0 0
31 0 0 0 0 0
32 0 0 0 0 0
33 0 0 0 0 0
34 0 0 0 0 0

Influenza Severe Outcomes Surveillance

Provincial/Territorial Influenza Hospitalizations and Deaths

In week 47, 221 influenza-associated hospitalizations and 26 ICU admissions were reported by participating provinces and territoriesFootnote 2. This week, less than 5 influenza-associated deaths were reported.

To date this season 1,152 influenza-associated hospitalizations were reported (August 28, 2022 to November 26, 2022) by participating provinces and territories

To date this season (August 28, 2022 to November 26, 2022), 109 ICU admissions and 36 influenza-associated deaths were reported.

Number of provinces and territories reporting in week 47: 9 out of 9

Figure 8 – Cumulative rates of influenza-associated hospitalizations by age-group and surveillance week, Canada, participating provinces and territories, week 2022-35 to 2022-47

Figure 8. Text version below.

Figure 8 - Text description
Surveillance Week 0-4 yrs 5-19 yrs 20-44 yrs 45-64 yrs 65+ yrs Overall
35 0.2 - 0.0 0.0 0.1 0.0
36 0.2 - 0.0 0.0 0.1 0.1
37 0.2 - 0.0 0.1 0.4 0.1
38 0.2 - 0.0 0.1 0.4 0.1
39 0.2 - 0.0 0.1 0.7 0.2
40 0.2 - 0.1 0.2 0.7 0.2
41 0.2 0.1 0.1 0.2 1.2 0.3
42 0.7 0.1 0.2 0.4 1.5 0.5
43 2.5 1.1 0.4 0.9 2.7 1.2
44 8.5 3.1 0.9 1.9 5.5 2.8
45 19.5 6.2 2.2 4.3 14.7 6.5
46 35.1 9.4 4.0 6.6 26.7 11.1
47 40.9 11.6 4.9 8.3 33.4 13.7

Pediatric Influenza Hospitalizations and Deaths

In week 47, 223 influenza-associated pediatric (≤16 years of age) hospitalizations and 37 ICU admissions were reported by the Immunization Monitoring Program Active (IMPACT) network. The number of weekly influenza-associated hospitalizations is well above levels typical of this time of year and is above levels typically seen at the peak of the influenza season (Figure 9). All hospitalisations reported in week 47 were associated with influenza A. This week, less than 5 influenza-associated pediatric deaths were reported.

To date this season (August 28, 2022 to November 26, 2022), 707 pediatric influenza-associated hospitalizations, 95 ICU admissions and less than 5 influenza-associated pediatric deaths have been reported. Children aged between 2-4 years and 5-9 years account for more than 50% of the reported pediatric hospitalizations (Figure 10).

Figure 9 – Number of pediatric (≤16 years of age) hospitalizations reported by the IMPACT network, by week, Canada, week 2022-35 to 2022-47

Figure 9. Text version below.

Figure 9 - Text description
Surveillance week 2022-2023 2021-2022 Average Min Max
35 1 0 0 0 1
36 1 0 1 0 2
37 0 0 1 0 2
38 1 0 1 0 2
39 1 0 1 0 3
40 1 0 1 0 2
41 4 0 2 0 3
42 7 0 3 0 7
43 41 0 4 1 11
44 79 0 6 1 21
45 152 0 9 2 36
46 196 0 12 1 37
47 223 1 11 1 35
48 #N/A 1 20 2 46
49 #N/A 1 21 3 41
50 #N/A 0 31 4 54
51 #N/A 2 44 5 82
52 #N/A 1 63 14 103
1 #N/A 1 62 21 107
2 #N/A 0 50 12 100
3 #N/A 0 51 27 80
4 #N/A 0 58 34 90
5 #N/A 0 59 25 120
6 #N/A 0 60 15 115
7 #N/A 0 59 17 118
8 #N/A 1 65 25 134
9 #N/A 1 57 12 151
10 #N/A 0 54 17 135
11 #N/A 0 51 16 118
12 #N/A 0 39 13 87
13 #N/A 8 32 15 66
14 #N/A 7 28 12 56
15 #N/A 18 25 11 56
16 #N/A 19 23 11 41
17 #N/A 23 19 9 37
18 #N/A 48 16 8 28
19 #N/A 36 11 5 19
20 #N/A 29 10 0 18
21 #N/A 32 6 4 9
22 #N/A 14 6 1 9
23 #N/A 16 3 1 7
24 #N/A 12 3 1 6
25 #N/A 9 2 0 5
26 #N/A 6 1 0 3
27 #N/A 3 1 0 2
28 #N/A 7 1 0 2
29 #N/A 2 1 0 3
30 #N/A 3 1 0 1
31 #N/A 1 0 0 0
32 #N/A 0 0 0 0
33 #N/A 1 0 0 2
34 #N/A 0 1 0 2
Figure 10 – Cumulative numbers of pediatric hospitalizations (≤16 years of age) with influenza by age-group reported by the IMPACT network, Canada, week 2022-35 to 2022-47

Figure 10. Text version below.

Figure 10 - Text description
Age Group Total
0-5 mo 57
6-23 mo 112
2-4 yr 203
5-9 yr 185
10-16 yr 150

Influenza Strain Characterization

Since September 1, 2022, the National Microbiology Laboratory (NML) has characterized 44 influenza viruses (37 A(H3N2), 7 A(H1N1)) received from Canadian laboratories.

Genetic Characterization of Influenza A(H3N2)

One influenza A(H3N2) virus did not grow to sufficient hemagglutination titers for antigenic characterization by hemagglutination inhibition (HI) assays. Therefore, NML has performed genetic characterization to determine the genetic group identity of this virus.

Sequence analysis of the HA gene of the virus showed that it belonged to genetic group 3C.2a1b.2a2.

A/Darwin/6/2021 (H3N2)-like virus is an influenza A/H3N2 component of the 2022-23 Northern Hemisphere influenza vaccine and belongs to genetic group 3C.2a1b.2a2.

Antigenic Characterization

Influenza A(H3N2)

Influenza A(H1N1)

Antiviral Resistance

The NML also tests influenza viruses received from Canadian laboratories for antiviral resistance.

Oseltamivir

40 influenza viruses (33 A(H3N2) and 7 A(H1N1)) were tested for resistance to oseltamivir and it was found that:

Zanamivir

40 influenza viruses (33 A(H3N2) and 7 A(H1N1)) were tested for resistance to zanamivir and it was found that:

Influenza Vaccine Monitoring

Vaccine monitoring refers to activities related to the monitoring of influenza vaccine coverage and effectiveness.

Vaccine Coverage

Influenza vaccine coverage estimates for the 2022-2023 season are anticipated to be available in February or March 2023.

Vaccine Effectiveness

Influenza vaccine effectiveness estimates for the 2022-2023 season are anticipated to be available in February or March 2023.

Provincial and International Surveillance Links

See Influenza surveillance resources

Notes

The data in the FluWatch report represent surveillance data available at the time of writing. All data are preliminary and may change as updates are received.

To learn more about the FluWatch program, see the Overview of influenza monitoring in Canada page.

For more information on the flu, see our Flu (influenza) web page.

We would like to thank all the FluWatch surveillance partners participating in this year's influenza surveillance program.

This report is available on the Government of Canada Influenza webpage.

Ce rapport est disponible dans les deux langues officielles.

Footnote 1

All Provinces and Territories (PTs) participate in the FluWatch outbreak surveillance system. This outbreak system monitors influenza and ILI outbreaks in long-term care facilities (LTCF), acute care facilities, schools and daycares, remote and/or isolated communities, and facilities categorized as 'other'. Not all reporting PTs report outbreaks in all these settings. All PTs report laboratory confirmed outbreaks in LTCF. Four PTs (NB, NL, NS and YK) report ILI outbreaks in schools and/or daycares and other facilities.

Return to footnote 1 referrer

Footnote 2

Influenza-associated hospitalizations are reported by Alberta, Manitoba, New Brunswick, Newfoundland and Labrador, Northwest Territories, Nova Scotia, Prince Edward Island and Yukon. Only hospitalizations that require intensive medical care are reported by Saskatchewan

Return to footnote 2 referrer

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