357 A viruses and 2 B viruses.

For weeks 40 have the Centers for Disease Control and Prevention in Atlanta characterized antigenically two influenza A viruses, 357 A viruses and 2 B viruses. Characterized by the 357 A viruses, 91 A/Panama/2007/99-like and 266 are A/Fujian/411/2002-like. About 70 human clinical samples by RT-PCR by RT-PCR, and all were negative. More than 1,000 people exposed to the virus antiviral antiviral and about 1,500 other people were vaccinated.