Yes, vaccines are safe. They are held to high standards and are rigorously tested before they reach you.
Every vaccine goes through rigorous and lengthy safety testing. This includes testing the vaccine through clinical trials. The FDA then analyzes the data and manufacturing process before deciding if they will approve the vaccine. Approved vaccines are then closely reviewed before being recommended by the CDC. Each batch is tested for quality and safety. The vaccine continues to be monitored in people for as long as it is used.
How do vaccines work?
Vaccines prepare your immune system to fight off dangerous diseases.
When you get a vaccine, it sparks your immune response, helping your body fight off and remember the germ. That way, if the germ ever invades again, your body will be able to recognize and attack it. Vaccines help your immune system fight infections faster and more effectively, and provide long-lasting immunity to serious diseases without the risk of serious illness.
Find more information at hhs.gov/immunization