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Post Date : 10/03/2006

Volume 1, Issue 1, March 2006

JSM Peiris & Wilina Lim

Department of Microbiology, The University of Hong Kong & Virology Division, Public Health Laboratory Services Branch, Centre for Health Protection, Department of Health, Hong Kong SAR 

Avian influenza A subtype H5N1 is endemic in poultry across south-east Asia and continues to cause zoonotic disease in humans. So far, transmission of virus from avian to humans appears very inefficient and sustained transmission from human-to-human has not occurred. However, with the continued opportunity for human exposure over an ever increasing geographic range, it is possible (though not inevitable) that H5N1 virus may acquire the ability to transmit efficiently from human-to-human, leading to a pandemic.

Human disease caused by H5N1 influenza virus typically presents either as a rapidly...