The share of U.S. kindergartners with exemptions from school vaccine requirements for the 2025-2026 school year rose to another record high, according to federal data posted Monday. The sharp increase from 3.6 to 4.2 percent seeking exemptions — about 155,000 students — extends a years-long erosion of childhood immunization rates as the country battles its worst measles resurgence in 35 years.
