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.

Critics say Kennedy is ordering a review of childhood vaccines to stoke skepticism, risking the spread of disease.

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.