Medical Hypotheses
Volume 74, Issue 2 , Pages 240-241, February 2010

The pandemic 2009 (H1N1) swine influenza virus is mild compared to the pandemic 1918 (H1N1) virus because of a proline-to-serine substitution in the receptor-binding site of its hemagglutinin – A hypothesis

The Marine Science Institute, College of Science, University of the Philippines Diliman, Quezon City 1101, Philippines

Received 14 September 2009; accepted 17 September 2009. published online 12 October 2009.

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PII: S0306-9877(09)00639-2

doi:10.1016/j.mehy.2009.09.034

Medical Hypotheses
Volume 74, Issue 2 , Pages 240-241, February 2010