South Carolina health officials said that the local measles outbreak has significantly accelerated after Thanksgiving and a series of large gatherings, and it is unlikely to end in the short term. As of Wednesday, the "Upstate" region in the northwest of the state has reported 111 cases of measles, with 27 new cases reported since last Friday alone. State epidemiologist Bell pointed out that the spread of the epidemic is closely related to holiday travel, gatherings, and low vaccination rates. The MMR vaccine coverage rate for school-age children in Spartanburg County and Greenville County is around 90%, which is significantly lower than the 95% needed to prevent an outbreak. Although the health department has deployed mobile vaccination clinics, the number of people vaccinated is limited, and there are currently no plans to add more vaccination points. The outbreak in South Carolina is not an isolated case: According to data from the Centers for Disease Control and Prevention (CDC), 1,912 cases of measles have been reported nationwide in 2025, most of which occurred among unvaccinated children and teenagers. Some areas in Arizona, Utah, and Colorado have also seen ongoing transmission.

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