Everyone 6 months of age and older should get a flu vaccine every season. Vaccination to prevent influenza is particularly important for people who are at high risk of serious complications from influenza. See People at High Risk of Developing Flu-Related Complications for a full list of age and health factors that confer increased risk.
Flu vaccination has important benefits. It can reduce flu illnesses, doctors’ visits, and missed work and school due to flu, as well as prevent flu-related hospitalizations.
Different flu vaccines are approved for use in different groups of people. Factors that can determine a person’s suitability for vaccination, or vaccination with a particular vaccine, include a person’s age, health (current and past) and any relevant allergies.
Flu shots are approved for use in pregnant women and people with chronic health conditions. There are flu shots that also are approved for use in people as young as 6 months of age and up.
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 2017-2018.
More information is available at Who Should Get Vaccinated Against Influenza.
- People who cannot get a flu shot
- Children younger than 6 months old
- People with severe, life-threatening allergies to flu vaccine or any of its ingredients
Note: There are certain flu shots that have different age indications. For example people younger than 65 years of age should not get the high-dose flu shot and people who are younger than 18 years old or older than 64 years old should not get the intradermal flu shot.
- People who should talk to their doctor before getting the flu shot
- People who have an allergy to eggs or other vaccine ingredients
- People who have ever had Guillain-Barre Syndrome (GBS)
- People who are feeling ill
It’s best to get vaccinated before flu begins spreading in your community; however, CDC continues to recommend flu vaccination as long as flu viruses are circulating since vaccination later can still be beneficial during most seasons. Given influenza activity levels as of February 3, 2018 and an increasing proportion of influenza B and H1N1 viruses being detected, CDC continues to recommend flu vaccination this season. It takes about two weeks after vaccination for antibodies to develop in the body that protect against flu.
Children who need two doses of vaccine to be protected should start the vaccination process sooner, because the two doses must be given at least four weeks apart.
The recommendations for vaccination of people with egg allergies have not changed since last season (2016-2017).
People with egg allergies can receive any licensed, recommended age-appropriate influenza vaccine and no longer have to be monitored for 30 minutes after receiving the vaccine. People who have severe egg allergies should be vaccinated in a medical setting and be supervised by a health care provider who is able to recognize and manage severe allergic conditions.
- Page last reviewed: October 26, 2017
- Page last updated: October 26, 2017
- 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