How are human infections with swine influenza 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 persons, especially children, may shed virus for 10 days or longer. •Identification as a swine flu influenza A virus requires sending the specimen to a hospital laboratory for testing.
