Author Affiliations: Center for Infectious Disease Research and Policy (Drs Osterholm, Ballering, and Kelley), Minnesota Center of Excellence for Influenza Research and Surveillance (Drs Osterholm and Kelley), University of Minnesota, Minneapolis.
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