US school vaccination rates inch down yet again and exemptions reach record high

U.S. kindergarten vaccination rates inched down again last year and the share of children with exemptions rose to an all-time high, according to federal data posted yesterday [Macau ime].

The fraction of kids exempted from vaccine requirements rose to 4.2%, up from 3.6% the year before. That’s an estimated 155,000 children nationally during the 2025-2026 school year.

It’s the fourth consecutive year that the national average exemption rate has reached a record, and the vast majority are parents withholding shots for nonmedical reasons. Exemptions increased in 41 states and the District of Columbia.

Experts point to turmoil caused by federal health officials.

U.S. Health Secretary Robert F. Kennedy Jr. was a leading voice in the antivaccine movement before President Donald Trump put him in charge of federal health agencies. In the last 18 months, Kennedy and other federal officials have repeatedly tried to revise and reduce childhood vaccination guidance. Earlier this month, Trump called for revamped childhood vaccination recommendations that promote his discredited theory that childhood shots should be spaced out into separate medical visits.