Avian Influenza H7N9 — Worldwide/Unknown
Abstract
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We used data on age and sex for 136 laboratory confirmed human A(H7N9) cases reported as of 11 Aug 2013 to compare age-specific and sex-specific patterns of morbidity and mortality from the avian influenza A(H7N9) virus with those of the avian influenza A(H5N1) virus. Human A(H7N9) cases exhibit high degrees of age and sex bias: mortality is heavily biased toward males older than 50 years, no deaths have been reported among individuals younger than 25 years old, and
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