AISR fortnightly report no. 1 – 22 April to 5 May 2019
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The Australian Influenza Surveillance Report (AISR) is compiled from several data sources used to monitor influenza activity and severity in the community. These data sources include:
- laboratory-confirmed notifications to NNDSS
- influenza-associated hospitalisations
- sentinel influenza-like illness (ILI) reporting from general practitioners
- ILI-related community level surveys
- sentinel laboratory testing results.
The AISR is published fortnightly during the influenza season, typically between May and October. Influenza activity updates may be published outside of the seasonal period.
Currently, influenza and influenza-like illness (ILI) activity are high for this time of year compared to previous years. At the national level, notifications of laboratory-confirmed influenza have decreased in the past fortnight, however it is likely these figures will be revised upwards due to backlogs in data entry. Influenza A was the most common respiratory virus detected in patients presenting with ILI to sentinel general practices this fortnight.
There is no indication of the potential severity of the 2019 season at this time.
There is no indication of the potential impact on society of the 2019 season at this time.
In the year to date and in the past fortnight, the majority of confirmed influenza cases reported nationally were influenza A (93%). Where subtyping data were available, influenza A(H3N2) was the dominant influenza A subtype in the past fortnight.