Australian influenza report 2013— 03 August to 16 August 2013 (#05/2013)

The Australian Influenza Report is compiled from a number of data sources, including laboratory-confirmed notifications to NNDSS, sentinel influenza-like illness reporting from General Practitioners and Emergency Departments, workplace absenteeism, and laboratory testing. Reports are produced fortnightly from May to October. A more in-depth end-of-season report is also published in Communicable Diseases Intelligence.

Page last updated: 29 August 2013

Current Report Summary

  • Although overall influenza activity remains relatively low compared to 2011 and 2012, the steady seasonal increase has continued.
  • Since the beginning of the year there have been 10,702 laboratory confirmed cases of influenza reported. Over the past fortnight there were 2,688 notifications, with almost a third reported from New South Wales (919).
  • Nationally, whilst influenza A remains the predominant influenza virus type, the proportion of influenza B continues to be higher than recent seasons. During the 2012 season there were very few notifications of influenza A(H1N1) pdm09. So far in 2013 whilst the majority of influenza A reports are unsubtyped, more than 10% of overall notifications have been reported as influenza A(H1N1) pdm09.
  • Across jurisdictions the distribution of influenza types and subtypes is variable. In Victoria there is a predominance of influenza type B, whereas most other states are reporting a predominance of influenza type A, with NSW reporting mostly A(H1N1)pdm09 and Western Australia mostly A(H3N2).
  • Over the past few weeks there has been a continued seasonal increase in influenza associated hospitalisations. Around 10% of influenza cases have been admitted directly to ICU. The age distribution of hospital admissions shows peaks in the 0-9 and over 60 years age groups typical of seasons dominated by A(H1N1).
  • The WHO has reported that influenza activity in the northern hemisphere temperate zones remains at inter-seasonal levels. In the temperate countries of South America and Southern Africa, influenza transmission peaked in late June and was primarily associated with influenza A(H1N1)pdm09.

Full Report

Accessibility Issues

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 and Ageing switchboard on 02 6289 1555 or 1800 020 103.