Measles outbreak in South Carolina grows; officials urge vaccination and track public exposure sites

South Carolina reports 646 cases as outbreak circulates in the community

South Carolina’s Department of Public Health (DPH) says the measles outbreak in the Upstate region has continued to expand, reaching 646 reported cases as of January 20, 2026, with updates posted online. Officials say most cases are close contacts of known infections, but a growing number of public exposure sites suggests measles is circulating more broadly in the community, raising the risk for people who are not immune.

DPH highlighted measles’ extreme contagiousness, noting that an infected person can spread the virus before they know they are sick and that the virus can remain in the air for up to two hours after someone leaves a location. The agency emphasized that vaccination (MMR/MMRV) is the best protection for individuals and for preventing further spread.

Public exposure locations and symptom watch windows

DPH has published a list of public exposure locations with dates and times so residents can determine whether they may have been exposed and when symptom monitoring should end. The exposure list includes retail and public-service sites across the region, and the department updates the table as new exposures are identified.

The exposure guidance is especially important because early symptoms can resemble common respiratory illness. Officials urge people who believe they were exposed to monitor for fever, cough, runny nose, and rash, and to contact healthcare providers before arriving in person so clinics can reduce the chance of onward transmission in waiting rooms.

Spillover beyond South Carolina

North Carolina health officials have linked cases to the South Carolina outbreak. The North Carolina Department of Health and Human Services reported additional cases in Buncombe County in three siblings after the family visited Spartanburg County roughly one to two weeks before the children became sick. Officials warned that people in a specific Mission Hospital emergency department waiting room time window could have been exposed.

Vaccination options and outreach

DPH said there were no scheduled Mobile Health Unit MMR vaccination events at the time of its update, but community partners can request a mobile unit visit, and vaccines remain available through health departments, pharmacies, and primary care providers. The department indicated it would prioritize MMR vaccination event requests and increase appointment availability if demand rises.

Practical steps for residents

• Check your vaccination status; if unvaccinated and eligible, seek MMR vaccination promptly.
• Review published exposure locations and watch for symptoms during the recommended window.
• Call ahead before visiting a clinic or emergency department if you suspect measles exposure.
• Keep infants and immunocompromised family members away from potential exposure settings when possible.

Health departments across the Carolinas say continued vaccination and careful contact tracing remain the most effective tools to slow the outbreak and reduce additional community transmission.