AISR fortnightly report no. 6 – 1 July to 14 July 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 above average for this time of year compared to previous years. However, this activity is not unusual when compared to the range of activity during an average influenza season. At the national level, notifications of laboratory-confirmed influenza have decreased in the past fortnight; however, this may be due in some measure to data entry backlogs.
Clinical severity for the season to date, as measured through the proportion of patients admitted directly to ICU, and deaths attributed to influenza, is low.
The majority of confirmed influenza cases reported nationally were influenza A in the year to date (83%) and past fortnight (77%). The proportion of influenza B nationally has been increasing each week since early May, however, the proportion has declined in the past week.