Weekly flu update

Weekly flu update

Number of laboratory-confirmed flu notifications for week ending: 11 August 2019

Sunday 11 August91
Sunday 4 August74
Sunday 28 July96
Sunday 21 July116

2019 YTD Total at Sunday 11 August:
2 050 [1 935 influenza A and 115 influenza B]

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 flu cases notified in Tasmania for each week of the year.  Lines for each of the four years 2015, 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 indicates the peak of the flu season usually occurs between July and October. Between 2015 to 2018, 2017 indicates the year of highest flu activity in Tasmania with a weekly peak above 450 flu cases occurring during August and September 2017. The line for 2018 indicates a year of very low flu activity with a peak of approximately 25 flu cases during early October 2018.  The line indicating flu cases in Tasmania during 2019 ends at week 32: the week ending Sunday 11 August. This line indicates that weekly flu cases were well above baseline levels between the middle of February and the middle of July. There was an initial peak in activity of 109 flu cases in week 16 (mid-April), followed by a decrease and then a second peak of 150 flu cases in week 28 (mid-July). There were 91 flu cases notified during week 32.

Figure 1: Flu notifications 2019 year to date and notifications 2015-18.