The CDC reported Friday that confirmed measles cases in 2025 increased from 14 to 93 in one week, largely due to an outbreak in Texas.

The Texas Department of State Health Services identified 90 cases since late January, with 57 in Gaines County. State officials anticipate additional cases given measles’ high transmissibility.

The CDC reported that 95% of cases occurred in individuals who were unvaccinated or had an unknown immune status. Four percent had received a single dose of the measles-mumps-rubella (MMR) vaccine.

Three outbreaks have been reported nationwide in 2025. By comparison, 16 outbreaks occurred in 2024, totaling 285 cases.

Measles transmission in the U.S. is typically linked to imported cases from endemic regions. In recent years, vaccine hesitancy has contributed to outbreaks, per federal health officials.