Avian influenza A(H7N9) virus
Avian influenza A(H7N9) is a subtype of influenza viruses that have been detected in birds in the past. This particular A(H7N9) virus had not previously been seen in either animals or people until it was found in March 2013 in China.
However, since then, infections in both humans and birds have been observed. The disease is of concern because most patients have become severely ill. Most of the cases of human infection with this avian H7N9 virus have reported recent exposure to live poultry or potentially contaminated environments, especially markets where live birds have been sold. This virus does not appear to transmit easily from person to person, and sustained human-to-human transmission has not been reported.
Analysis of recent scientific information on avian influenza A(H7N9) virus
- Monthly Risk Assessment Summary - Influenza at the Human-Animal Interface
Previous situation analysis
Technical guidance - surveillance
Technical guidance - vaccine
Technical guidance - clinical
Post-exposure antiviral chemoprophylaxis of close contacts of a patient with confirmed H7N9 virus infection and/or high risk poultry/environmental exposures.