Weekly flu update

flu update

Weekly flu update

Number of laboratory-confirmed flu notifications for week ending: 26 July 2020

WeekWeek endingNotifications
30Sunday, July 260
29Sunday, July 190
28Sunday, July 121
27Sunday, July 51

Confirmed cases at Sunday 26 July 2020: 160 [139 influenza A and 21 influenza B]

View previous notifications - weeks 1 to 26 >

WeekWeek endingNotifications
26Sunday, June 280
25Sunday, June 211
24Sunday, June 140
23Sunday, June 71
22Sunday, May 310
21Sunday, May 241
20Sunday, May 171
19Sunday, May 103
18Sunday, May 32
17Sunday, April 260
16Sunday, April 191
15Sunday, April 120
14Sunday, April 50
13 Sunday, March 29 5
12 Sunday, March 22 8
11 Sunday, March 15 11
10 Sunday, March 8 16
9 Sunday, March 1 12
8 Sunday, February 23 8
7 Sunday, February 16 15
6 Sunday, February 9 13
5 Sunday, February 2 20
4 Sunday, January 26 8
3 Sunday, January 19 11
2 Sunday, January 12 22
1 Sunday, January 5 4

Figure 1 is a line graph with a horizontal axis indicating the 52 weeks of the year. The vertical axis indicates the number of laboratory confirmed influenza cases notified in Tasmania for each week of the year.  Lines for each of the three years 2016, 2017 and 2018 each indicate low baseline flu activity between January and May as well as between November to December. The line for each year shows that the peak of the flu season generally occurs between July and October. The line for 2017 indicates a year of high flu activity in Tasmania with a weekly peak above 450 flu cases occurring during August and September 2017. The line for 2018 shows a year of very low flu activity with a peak of approximately 25 flu cases during early October 2018.  The line for 2019 indicates that weekly flu cases were well above baseline levels between the middle of February and the middle of July. Activity was high early in the year with a high of 109 cases mid-April. Activity then decreased and increased steadily from 1 June to mid-July before decreasing again until the start of August. Weekly flu cases peaked again with a high of 180 cases during the middle of August before decreasing to the end of the year.  The line indicating flu cases in Tasmania for 2020 shows a higher number of cases for January and February compared to the four-year average 2016 to 2019. Notifications decreased in March coinciding with the social distancing policies implemented in response to the COVID-19 pandemic and have remained low.

Figure 1. Notifications of influenza in Tasmania, by week, 1 January 2016 to 26 July 2020.