How are routine vaccines tested for safety?

How are routine vaccines tested for safety?

Vaccines are key to keeping ourselves and our world healthy. Most people have received at least one vaccine in their lifetime, but few know exactly how their safety is determined. In the U.S., vaccines go through many stages of safety testing before they are approved, as well as additional safety monitoring for as long as they are on the market. Additionally, researchers worldwide study any possible link between vaccines and health issues. “Vacc…