Vaccines play an important role in keeping us healthy. They protect us from serious and sometimes deadly diseases — like haemophilus influenzae type b (Hib) and measles. It’s normal to have questions about vaccines. works with scientists and doctors to answer your questions and provide the information you need to get vaccinated such as:


Once you have the information you need, make sure that you and your family are up-to-date on your vaccinations — they’re your best shot against serious, preventable illness. Find more answers to common questions about vaccines.

As you learn about vaccines and how they protect you, it may be helpful to understand the difference between vaccines, vaccinations, and immunizations.

Vaccine: A vaccine is made from very small amounts of weak or dead germs that can cause diseases — for example, viruses, bacteria, or toxins. It prepares your body to fight the disease faster and more effectively so you won’t get sick.

Example: Children younger than age 13 need 2 doses of the chickenpox vaccine.

Vaccination: Vaccination is the act of getting a vaccine, usually as a shot.

Example: Schedule your tetanus vaccination today.

Immunization: Immunization is the process of becoming immune to (protected against) a disease.

Example: Because of continued and widespread immunization in the United States, it’s rare for Americans to get polio.

This information is credit to

Other Vaccine Resources:

Pregnancy and Vaccination

Vaccines from birth to 18 years of age

Vaccines for Adults

For Healthcare Providers

CDC Press Releases & Media Advisories

Immunization Action Coalition Vaccine Information