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Emerg Infect Dis 2010;16(6):1028-1029
Additional Reading: "The Wages of Original Antigenic Sin," accompanying commentary from D.M. Morens, D.S. Burke, and S. B. Halstead.
While pandemic (H1N1) 2009 was in its earliest stages, age distribution data indicated surprisingly few cases among persons >65 years of age. The initial assumption was that few persons >65 years of age had yet to be exposed. However, as more data became available from Mexico, Australia, and the United States, the age distribution pattern persisted.1
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