Chicks and wild ducks dunnit


EVER since H5N1 bird flu spread across Eurasia last year, battle has raged between those who blame it all on migrating wild birds and others who reckon it’s the poultry. In fact it was both. Marm Kilpatrick of the Consortium for Conservation Medicine in New York and colleagues analysed how the virus travelled by comparing H5N1 gene sequences against volumes of bird trade and migration. They found that the poultry trade explains the virus’s spread in Asia but migration explains it in Europe (Proceedings of the National Academy of Sciences, DOI:
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