Robert Böhm and colleagues' peer-reviewed Science paper, published April 30, used a 3,000-adult experiment to show that the Centers for Disease Control and Prevention's revised autism-and-vaccines webpage — the November 2025 rewrite stating "studies have not ruled out the possibility that infant vaccines cause autism" — measurably lowers stated vaccination intentions, amplifies uncertainty, and increases endorsement of science-denial reasoning compared to the prior wording. [1][2] Yesterday's paper anchored the household measles receipt against the CDC autism-page rewrite as the institutional reactor running parallel to the November PAHO clock; today the Science paper turns that reactor into a quantified variable. The CDC page still carries the asterisked header "Vaccines do not cause autism" only because of an agreement with Senator Bill Cassidy; the body text contradicts the header. [3] The Böhm experiment is the first peer-reviewed measurement of harm attributable to a specific federal-website language change. The PAHO clock counts cases; the Science paper counts trust.

-- NORA WHITFIELD, Chicago