The emergence of avian influenza A(H7N9) virus in humans has public health authorities around the world on high alert for the potential development of a human influenza pandemic.1 As of May 8, 2013, authorities had identified 131 confirmed cases and 32 deaths among residents of 8 provinces and 2 municipalities in China.2
Osterholm MT, Ballering KS, Kelley NS. Major Challenges in Providing an Effective and Timely Pandemic Vaccine for Influenza A(H7N9). JAMA. 2013;309(24):2557–2558. doi:10.1001/jama.2013.6589
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