How can human infections with swine influenza be diagnosed?
To diagnose swine influenza A infection, a respiratory specimen would generally need to be collected within the first 4 to 5 days of illness (when an infected person is most likely to be shedding virus). However, some people, especially children, may shed virus for 10 days or longer. Identification ofswine influenza A virus requires sending the specimen to CDC for laboratory testing at this time.
