Weekly flu update

flu update

Weekly flu update

Number of laboratory-confirmed flu notifications for week ending: 17 October 2021

WeekWeek endingNotifications
41Sunday,  17 October1
40Sunday, 10 October0
39Sunday, 3 October0
38Sunday, 26 September 0

Confirmed cases at Sunday 17 October 2021: 36 [17 influenza A and 19 influenza B]

View previous notifications from 10 January 2021  >

WeekWeek endingNotifications
37Sunday, 19 September2
36Sunday, 12 September 0
35Sunday, 5 September3
34Sunday, 29 August0
33Sunday, 22 August0
32Sunday, 15 August0
31Sunday, 8 August4
30Sunday, 1 August1
29Sunday, 25 July3
28Sunday,  18 July1
27Sunday, 11 July1
26Sunday, 4 July2
25Sunday, 27 June1
24Sunday,  20 June1
23Sunday, 13 June3
22Sunday,  6 June0
21Sunday, 30 May1
20Sunday, 23 May1
19Sunday, 16 May2
18Sunday, 9 May0
17Sunday,  2 May0
16Sunday, 25 April2
15Sunday, 18 April0
14Sunday, 11 April1
13Sunday, 4 April0
12Sunday, 28 March1
11Sunday,  21 March0
10 Sunday, 14 March 1
9 Sunday, 7 March 0
8Sunday, 28 February 20210
7Sunday, 21 February 20210
6Sunday, 14 February 20210
5Sunday, 7 February 20210
4Sunday, 31 January 20210
3Sunday, 24 January 20212
2Sunday, 17 January 20210
1 Sunday, 10 January 2021 2

View previous notifications from 5 January 2020 to 3 January 2021  >

WeekWeek endingNotifications
53Sunday, January 31
52Sunday, December 271
51Sunday, December 201
50 Sunday, December 13 0
49 Sunday, December 6 2
48 Sunday, November 29 0
47 Sunday, November 22 0
46 Sunday, November 15 0
45 Sunday, November 8 0
44 Sunday, November 1 0
43 Sunday, October 25 1
42 Sunday, October 18 0
41 Sunday, October 11 0
40 Sunday, October 4 1
39 Sunday, September 27 0
38 Sunday, September 20 0
37 Sunday, September 13 0
36 Sunday, September 6 0
35 Sunday, August 30 0
34 Sunday, August 23 0
33 Sunday, August 16 1
32 Sunday, August 9 0
31 Sunday, August 2 0
30 Sunday, July 26 0
29 Sunday, July 19 0
28 Sunday, July 12 1
27 Sunday, July 5 1
26 Sunday, June 28 0
25 Sunday, June 21 1
24 Sunday, June 14 0
23 Sunday, June 7 1
22 Sunday, May 31 0
21 Sunday, May 24 1
20 Sunday, May 17 1
19 Sunday, May 10 3
18 Sunday, May 3 2
17 Sunday, April 26 0
16 Sunday, April 19 1
15 Sunday, April 12 0
14 Sunday, April 5 0
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 years 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 three-year average from 2017 to 2019. Notifications decreased in March coinciding with the social distancing policies implemented in response to the COVID-19 pandemic and remained low throughout the year. The line for 2021 indicates ongoing low flu activity for the year to date.

Figure 1. Notifications of influenza in Tasmania, by week, 1 January 2017 to 17 October 2021.