A pandemic can occur when a new influenza A virus is able to easily infect and spread among people.
ÐÇ¿ÕÓéÀÖ¹ÙÍø plays an important role in helping to establish, maintain, and expand flu surveillance.
National, state and local pandemic planning and response tools
Learn about ÐÇ¿ÕÓéÀÖ¹ÙÍø's global flu programs and ÐÇ¿ÕÓéÀÖ¹ÙÍø's work to protect the United States and the world.
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Pandemic Vaccine Targeting Guidance leads U.S. preparedness and response in a flu pandemic.
Past descriptions and report summaries for influenza A viruses assessed by the IRAT