Politics

• Little-known but Vital: Robert F. Kennedy Jr. is targeting a little-known program that underpins childhood immunizations in the U.S. by paying people who suffer rare side effects from shots.
• A Serious Risk: Dramatic changes to the Vaccine Injury Compensation Program risk driving drugmakers from the market, threatening access to shots, experts say.
• A Fragile System: The program underscores the fragility of America’s childhood immunization program at a time when Kennedy is renewing debunked claims about the dangers of vaccines.