Vaccines today

Do vaccines protect for a lifetime?

To provide the best protection, some vaccines require an additional dose or doses as we get older. For example, the pertussis vaccine offers a good level of protection within the first two years of getting vaccinated, but then protection decreases over time. This is...

What is community immunity?

Most vaccine-preventable diseases are spread from person to person. If one person in a community gets an infectious disease, he or she can spread it to others who are not immune. But a person who has been vaccinated is less likely to get that disease and spread it to...

Why is vaccine immunity beneficial?

Immunity is the body’s way of protecting against and preventing disease. Children are born with an immune system composed of cells, glands, organs, and fluids located throughout the body. The immune system recognizes germs that enter the body as “foreign...

What is in the vaccines?

Vaccines help develop immunity by imitating an infection. This type of infection doesn’t cause illness, but it does cause the immune system to produce antibodies that help protect you from the disease in the future. Vaccines contain ingredients called antigens, which...

How well-tested are these vaccines?

Currently, the United States has the safest, most effective vaccine supply in its history. Hundreds of medical studies completed over many decades by credible and respected doctors and scientists across the world have found that vaccines are safe for the overwhelming...