Immunization Hotline

Resources for Physicians, Resources for Seniors
Immunizations

Call the CDC National Immunization Hotline (NIH) at 1-800-232-4636.

Whether you are a doctor, patient or health care professional interested in vaccine information, you can find the answers you need by calling the CDC National Immunization Hotline (NIH) at 1-800-232-4636.

NIH is the place for the most up-to-date immunization information including vaccine schedules, side effects, contraindications, recommendations, and more. Live, trained specialists provide individualized attention. Hours of operation are Monday through Friday, from 8 a.m. to 11 p.m. EST.