Australian Influenza Surveillance Report - week ending 23 September 2018 (#09/2018)

The Australian Influenza Surveillance Report and Activity Updates are compiled from a number of data sources, which are 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; and sentinel laboratory testing results.

Page last updated: 28 September 2018

The Australian Influenza Surveillance Report is published on a fortnightly basis during the influenza season, typically between May and October. Influenza activity updates will be published outside of the seasonal period.

Australian Influenza Surveillance Report No 09 - week ending 23 September 2018

Summary

  • Activity – In the last fortnight, at the national level, there were declines in the majority of indicators for person to person transmission of influenza and influenza-like illness (ILI), signalling that nationally the season peaked in recent weeks or is nearing its peak. This is the first fortnight this season where influenza was the dominant cause of ILI among patients attending sentinel GPs and samples tested through sentinel laboratories.
  • Severity – 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.
  • Impact – Currently, the impact of circulating influenza on society, as measured through the proportion of people with ILI taking time off work, and the burden on hospitals, is low.
  • Virology – This fortnight, the majority of confirmed influenza cases reported nationally were influenza A (88%), and where subtyping data were available, influenza A(H1N1)pdm09 was the dominant subtype.
  • At-risk populations - Children aged less than 10 years appear to be more commonly infected with influenza; however the severity of illness in this population is on par with other age-groups.

Full Report

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Previous Reports and Updates

Annual Reports

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Should you encounter issues in accessing the information contained either on this webpage or within the downloadable full reports please email flu (flu@health.gov.au) or contact the Department of Health switchboard on 02 6289 1555 or 1800 020 103.

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