Measles in South Carolina: one new case as vaccination rates rise

South Carolina reported one new measles case in a March 6 update as the state recorded more than 17,300 MMR doses in February, and officials say the outbreak that began in October has shown signs of slowing.

State health officials reported one new measles case in their March 6 update and noted the outbreak has shown signs of slowing. The South Carolina Department of Public Health identified the outbreak’s start in the Upstate in October and has since confirmed 991 cases. Officials reported 52 people are currently in quarantine and did not list new exposure sites. The agency said higher vaccination activity has likely contributed to a slowdown in new cases. Key details: - The Department of Public Health has confirmed 991 measles cases since the outbreak began in October. - One new case was reported since the March 3 update. - Fifty-two people are currently in quarantine, and no new exposure sites were released in the most recent update. - More than 17,300 MMR doses were administered across the state in February, up from about 7,100 doses in February 2025. - Spartanburg County reported a 139% increase in doses administered from February 2025 to February 2026. - Of the 991 confirmed cases, 925 were reported as unvaccinated, 26 were fully vaccinated, 19 were partially vaccinated, and 21 have unknown vaccination status. Summary: The increase in vaccine doses administered statewide coincides with officials' reports that the outbreak is slowing, though a small number of new cases continues to be recorded. Undetermined at this time.