As of June 6, 1,168 measles cases and 17 outbreaks have been confirmed in 33 U.S. states and New York City. 95% of cases are in unvaccinated individuals and those who do not know their vaccination status.

A recent study published in JAMA found a significant decline in measles-mumps-rubella (MMR) vaccines in children from 2019-2024.

The study says, “If vaccination rates continue to decline, measles is likely to return to endemic levels in the US.”