Measles cases in South Carolina have risen to 997, including one new infection since Friday, according to state health data. Officials said the outbreak, which began in October, remains concentrated in the northwest part of the state, including Greenville and Spartanburg.

Of those infected, 932 were unvaccinated, 20 were partially vaccinated, 26 were fully vaccinated, and 19 had unknown vaccination status. At least eight people are in quarantine following exposure, though none are currently in isolation.

The state has enlisted a dozen infectious-disease specialists from the CDC Foundation to assist in managing the outbreak, the largest U.S. measles outbreak in more than three decades. Most cases involve children aged 5-17, followed by children under five.

Nationally, the Centers for Disease Control and Prevention reported 1,362 measles cases in the United States as of March 12, 2026, highlighting the wider resurgence of the disease.

Health officials continue to emphasize vaccination as the most effective measure to prevent further spread.