Journal article
Early transmission characteristics of influenza A(H1N1)v in Australia: Victorian state, 16 May - 3 June 2009.
E McBryde, I Bergeri, C van Gemert, J Rotty, E Headley, K Simpson, R Lester, M Hellard, J Fielding
Euro Surveillance Bulletin Europeen Sur Les Maladies Transmissibles European Communicable Disease Bulletin | Published : 2009
Abstract
Australia was one of the first countries of the southern hemisphere to experience influenza A(H1N1)v with community transmission apparent in Victoria, Australia, by 22 May 2009. With few identified imported cases, the epidemic spread through schools and communities leading to 897 confirmed cases by 3 June 2009. The estimated reproduction ratio up to 31 May 2009 was 2.4 (95% credible interval (CI): 2.1-2.6). Methods designed to account for undetected transmission reduce this estimate to 1.6 (95% CI: 1.5-1.8). Time varying reproduction ratio estimates show a steady decline in observed transmission over the first 14 days of the epidemic. This could be accounted for by ascertainment bias or a tr..
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Awarded by National Medical Health and Medical Research Council (NHMRC)
Funding Acknowledgements
We would like to thank staff of the Victorian Government Department of Health for case investigation and collection of epidemiological data and the Victorian Infectious Diseases Reference Laboratory for laboratory investigation and diagnosis of cases. We also gratefully acknowledge healthcare workers and staff of other healthcare services who have notified cases and informed Victoria's influenza surveillance system in 2009. This study was funded through a National Medical Health and Medical Research Council (NHMRC) urgent grant number 603753.