Low interim influenza vaccine effectiveness, Australia, 1 May to 24 September 2017
Sheena G Sullivan1,2,3, Monique B Chilver3, Kylie S Carville4
1WHO Collaborating Centre for Reference and Research on Influenza, Melbourne, Australia.
Abstract:
In 2017, influenza seasonal activity was high in the southern hemisphere. We present interim influenza vaccine effectiveness (VE) estimates from Australia. Adjusted VE was low overall at 33% (95% confidence interval (CI): 17 to 46), 50% (95% CI: 8 to 74) for A(H1)pdm09, 10% (95% CI: -16 to 31) for A(H3) and 57% (95% CI: 41 to 69) for influenza B. For A(H3), VE was poorer for those vaccinated in the current and prior seasons.
