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Influenza-Related Questions & Answers by Topic

Note: For the 2016-17 season, CDC recommends use of the flu shot (inactivated influenza vaccine or IIV) and the recombinant influenza vaccine (RIV). The nasal spray flu vaccine (live attenuated influenza vaccine or LAIV) should not be used during 2016-17. The 2016-17 influenza vaccination recommendations are now available.

The Flu Season

Flu Vaccines & Preventing Flu Illness

Types of Flu Vaccines

Vaccine Virus Selection, Vaccine Safety & Supply

Flu Treatment & What to Do If You Get Sick

Flu & Other Diseases

Vaccine Information for Health Care Workers

Other Influenza Viruses