Flu Bulletin - 2018/19 - Week 51

Data presented are for Week 51 (December 16th, 2018 to December 22nd, 2018) and was extracted on December 27th, 2018. 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	Higher	23	12	56
Number of influenza outbreaks in institutions	Similar	0	0	0
+Percent positivity of lab specimens tested for Influenza A (Erie St. Clair Region)	Higher	31% (Week 50)	22% (Week 49)	11%
+Percent positivity of lab specimens tested for Influenza B (Erie St. Clair Region)	Similar	0% (Week 50)	0% (Week 49)	0%
*Percent of emergency department visits due to influenza-like illness or respiratory syndrome	Similar	9%	9%	8%

⁺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	23	100%	56	100%
Influenza B	0	0%	0	0%
Influenza A & B	0	0%	0	0%
Total	23	100%	56	100%

Table 3. Outbreaks of influenza in institutions

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

⁺Includes combined outbreaks of Influenza and other microorganisms. 

Influenza cases - 2018-19 - Week 51

Circulating strains - 2018-19 - Week 51

ED visits - 2018-19 - Week 51