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Three more states, Louisiana, Virginia, and Missouri, reported their first measles cases of 2025, all linked to international travel. This brings the total number of states with reported measles cases to at least 27. The U.S. has seen a significant surge in measles cases this year, nearing 800 confirmed cases—almost triple the number in 2024. Health officials are concerned about the rapid spread, particularly given that 96% of cases involve unvaccinated individuals. The current outbreak is concentrated in six states experiencing significant outbreaks with three or more related cases.

Prepared by Olivia Bennett and reviewed by editorial team.