In the United States, the Centers for Disease Control and Prevention (CDC) and other national organizations advise people about which immunizations they should get and when. Immunization schedules are for healthy children, teens, and adults as well as for people who have health problems and other circumstances, including pregnancy, asthma, or diabetes. To see or print a list of recommended immunizations based on your age, past immunization history, and other factors, see the CDC immunization schedules at www.cdc.gov/vaccines/schedules/index.html.

Children and teens in the United States usually need proof that all their immunizations are up-to-date before they can start school or day care. Also, students of any age entering college usually need to have a written record showing that their immunizations are up-to-date.

For more information on when to get vaccines, see the topic Immunizations.

The CDC may recommend certain immunizations for people who are going to travel to a foreign country. For more information, see the topic Travel Health.