RFK Jr. doubles down on vaccine meddling as CDC junks scientific study Kennedy's tesimony sets up another clash over vaccines with next CDC director. https://arstechnica.com/health/2026/04/rfk-jr-doubles-down-on-vaccine-meddling-as-cdc-junks-scientific-study/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social