Surveillance for Avian Influenza A(H7N9), Beijing, China, 2013

Abstract

During surveillance for pneumonia of unknown etiology and sentinel hospital–based surveillance in Beijing, China, we detected avian influenza A(H7N9) virus infection in 4 persons who had pneumonia, influenza-like illness, or asymptomatic infections. Samples from poultry workers, associated poultry environments, and wild birds suggest that this virus might not be present in Beijing.

Keywords

• influenza
• avian influenza
• avian influenza virus
• viruses
• avian influenza (H7N9)
• avian influenza (H7N9) virus