How do vaccines work? Here's what medical experts want you to know about safety and efficacy.

COVID-19 vaccines lower the risk of getting sick, seriously ill or dying from the disease. But how do the different types of COVID-19 vaccines work? Each COVID-19 vaccine causes the immune system to ...

An experimental treatment protects mice from COVID-19, flu, bacteria, and more.

Vaccines have traditionally worked by teaching the immune system to recognize a specific virus or bacterium—in effect, ...

HHS Secretary Robert F. Kennedy Jr.'s vaccine advisors have set their sights on aluminum adjuvants in vaccines as part of their review of the U.S. pediatric vaccine schedule. While the concept of ...