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.

Kennedy dismissed the entire committee on June 9, accusing the former members of lacking public trust and being "plagued with persistent conflicts of interest," despite the committee's transparent disclosure and conflict of interest policies.