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Types of Flu
What are the differences are between seasonal flu, H1N1 (swine flu), and H5N1 (avian flu)? In this section you will learn about each of these types of flu.
Seasonal Flu
Learn when to expect seasonal flu, how it spreads, and who tracks cases in the United States.
H3N2v
Get information on H3N2v, how it spreads, who's monitoring it, and how to prevent it.
H1N1 (Swine Flu)
Get information on the status of H1N1 in the United States and how to prevent it.
H5N1 (Avian Flu)
Learn how to prevent H5N1 flu and how cases are monitored around the world.




