Viruses from ducks and chickens dominate the family tree of H7N9BMJ 2013; 346 doi: http://dx.doi.org/10.1136/bmj.f2895 (Published 08 May 2013) Cite this as: BMJ 2013;346:f2895
The new avian influenza virus H7N9 is genetically diverse and evolved from at least four sources, including viruses carried by wild ducks, domestic ducks, and chickens, say researchers. The new virus’s family tree suggests close links with an H7 …
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