Vol.75, No.5 May 2013
Explanation of the cover photograph
Incursion and Spread of H5N1 Highly Pathogenic Avian Influenza Viruses among Wild birds in 2010–11 Winter in Japan Kosuke SODA et al. (pp. 605–612)
Map of H5N1 highly pathogenic avian influenza virus infection in wild birds (circles) and chickens (triangles) in the 2010-11 winter in Japan. The times of outbreaks and the hemagglutinin lineages of causal viruses were represented by the different colors.
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