Gao HN, Lu HZ, Cao B, Du B, Shang H, Gan JH, et al. N Engl J Med. 2013 Jun 13;368(24):2277-85.
Background: During the spring of 2013, a novel avian-origin influenza A (H7N9) virus emerged and spread among humans in China. Data were lacking on the clinical characteristics of the infections caused by this virus.
Methods: Using medical charts, we collected data on 111 patients with laboratory-confirmed avian-origin influenza A (H7N9) infection through May 10, 2013.