Victoria....R.I.P., page-51

Below is the rate of influenza notifications for WA.

2019 may have been an outlier but compare the drop in May between 2018 and 2020.

Why is it so?

Number and rate of influenza notifications in Western Australia,
by month and year of disease onset, January 2016 to May 2021

	Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Total	Rate *
2016	120	191	204	171	267	348	895	2465	2202	655	207	134	7859	296.9
2017	149	116	140	104	167	253	601	1228	1788	876	338	235	5995	219.8
2018	283	314	247	160	228	435	726	926	1138	637	341	395	5830	211.1
2019	586	508	415	576	3585	10530	4948	1020	392	214	180	257	23211	823.6
2020	495	378	223	27	17	23	9	6	2	3	6	13	1202	41.8
2021	2	7	1	2	6^	-	-	-	-	-	-	-	18

* Rate=annual crude rate per 100,000 population. Rates only provided for those years with complete data.

^Data for current and most recent reporting periods may be incomplete.

Notifiable infectious disease report (health.wa.gov.au)