Flu Bulletin - 2018/19 - Week 12

Data presented are for Week 12 (March 17th, 2019 to March 23rd, 2019) and was extracted on March 26th, 2019. Data presented represent a snapshot of the information at the time of extraction and may differ from previous or subsequent reports.

Table 1. Summary of activity for current reporting week

Indicator	Trend From Previous Week	Current Week	Previous Week	Season
Number of lab-confirmed influenza cases	Lower	1	5	140
Number of influenza outbreaks in institutions	Similar	0	0	2
+Percent positivity of lab specimens tested for Influenza A (Erie St. Clair Region)	Lower	5% (Week 11)	16% (Week 10)	14%
+Percent positivity of lab specimens tested for Influenza B (Erie St. Clair Region)	Higher	3% (Week 11)	0% (Week 10)	<1%
*Percent of emergency department visits due to influenza-like illness or respiratory syndrome	Similar	6%	5%	7%

⁺Includes Windsor-Essex, Chatham-Kent and Lambton. For the trend comparison, the previous week is compared to the week prior (i.e. if the reporting week is 45, week 44 is compared to week 43). The values for percent positivity for the season are as of the end of the previous reporting week.

^*Historical values are displayed in the last figure (see below).

Table 2. Number of lab-confirmed influenza cases for report week and season

Causative Agent	Current Week (N)	Current Week (%)	Season (N)	Season (%)
Influenza A	0	0%	139	99%
Influenza B	1	100%	1	1%
Influenza A & B	0	0%	0	0%
Total	1	100%	140	100%

Table 3. Outbreaks of influenza in institutions

Causative Agent	Current Week (N)	Current Week (%)	Season (N)	Season (%)
Influenza A+	0	0%	2	100%
Influenza B+	0	0%	0	0%
Influenza A & B	0	0%	0	0%
Total	0	-	2	100%

⁺Includes combined outbreaks of Influenza and other microorganisms. 

 

Influenza cases - 2018-19 - Week 12

Circulating strains - 2018-19 - Week 12

ED visits - 2018-19 - Week 12