Note: “ACIP Recommendations for the Use of Quadrivalent Live Attenuated Influenza Vaccine (LAIV4) — United States, 2018–19 Influenza Season” appeared in an MMWR report on June 8, 2018. The full ACIP recommendations on the Prevention and Control of Seasonal Influenza with Vaccines will be published later this summer. Content throughout the rest of the influenza web site will be updated over the coming weeks.
Influenza (flu) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness. Serious outcomes of flu infection can result in hospitalization or death. Some people, such as older people, young children, and people with certain health conditions, are at high risk of serious flu complications.
The best way to prevent flu is by getting vaccinated each year.
- Page last reviewed: July 24, 2018
- Page last updated: July 13, 2018
- Content source:
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD)
- Page maintained by: Office of the Associate Director for Communication, Digital Media Branch, Division of Public Affairs