By Brian Bennett January 28, 2025 5:49 PM EST W hen Robert F. Kennedy Jr. starts the first of two days of confirmation hearings on Wednesday, it won’t be just a big moment for the former environmental lawyer and presidential candidate. It will also be a breakthrough event for the once-fringe anti-vaccine movement, as Senators weigh allowing one of its most high-profile boosters to head the nation’s top health agency. Vaccines prevent tens of thousands of deaths and millions of cases of disease