Today, childhood vaccination rates are falling across thousands of counties, with nearly 4 in 10 dropping by more than 5 percentage points since 2019.
The data focused on MMR vaccinations for kindergartners and tracked medical exemptions, nonmedical exemptions, and up-to-date vaccination status. The figures were collected from state governments and public records, and variant checks mostly agreed with the main findings. Fewer than 2% of counties declined by 0.1 percentage points or less since 2019.