A resurfaced video of RFK Jr. from 2023 shows him falsely linking the polio vaccine to other diseases. Ari Melber fact checks the heath secretary's claims.

Kennedy gutted a key vaccine advisory panel. Now, physicians are figuring out how they can continue to share evidence-based guidance to keep patients healthy.

Health and Human Services Secretary Robert F. Kennedy Jr. fired all 17 members of the Centers for Disease Control and Prevention’s vaccine advisory panel, claiming it “has been plagued with persistent conflicts of interest and has become little more than a rubber stamp for any vaccine.