South Carolina is now experiencing the largest measles outbreak in the United States since 2025, according to newly released public health data. The outbreak, which began in October, has grown rapidly and has officially surpassed the scale of the 2025 Texas measles outbreak that shocked the nation. Health officials warn that low vaccination rates, especially among children, remain the primary driver behind the surge in cases. South Carolina Measles Outbreak: Key Facts at a Glance As of late January 2026, South Carolina has confirmed 789 measles cases, with the majority concentrated in Spartanburg County, located in the northwestern region of the state. South Carolina Measles Outbreak Summary CategoryCurrent DataTotal confirmed cases789Increase in latest update+89 casesHospitalizations18 patientsPrimary affected countySpartanburg CountyOutbreak start dateOctober 2025Children under 17Over 88% of casesSchools affected23 schoolsPublic exposure sitesSchools, stores, state museum Public health officials report that several schools have implemented quarantine measures, while additional exposure investigations remain ongoing. Comparison: South Carolina vs. Texas 2025 Measles Outbreak The current South Carolina outbreak has now exceeded the scale of the major West Texas measles outbreak of 2025, which had previously been the largest in decades. Measles Outbreak Comparison Table LocationTotal CasesHospitalizationsDeathsOutbreak PeriodSouth Carolina789180Oct 2025 – OngoingWest Texas762992Jan–Aug 2025 While the Texas outbreak resulted in more severe outcomes, including fatalities, the South Carolina outbreak is notable for its rapid growth and high concentration among children. Vaccination Status: A Major Factor in the Outbreak Health authorities emphasize that most measles cases in South Carolina occurred in unvaccinated individuals. Vaccination Status of South Carolina Patients Vaccination StatusNumber of PatientsFully vaccinated (2 doses)20Partially vaccinated (1 dose)14UnvaccinatedOver 690Unknown status60 The data highlights the critical role of measles vaccination in preventing widespread transmission. Why Children Are Most Affected More than 88% of confirmed cases involve children under the age of 17. Schools have become central points of exposure, prompting quarantines and heightened monitoring. Public health experts note that measles spreads easily in environments where individuals are unvaccinated and in close contact, such as classrooms and childcare facilities. Measles Trends in the United States: A Growing Concern The South Carolina outbreak follows a troubling national trend. U.S. Measles Case Overview YearReported Cases2025Over 2,200 cases2026 (to date)Over 400 cases The United States recorded its highest number of measles cases in decades in 2025, and early 2026 data suggests continued vulnerability. Public Health Response and Ongoing Monitoring State health officials are expanding surveillance, issuing exposure alerts, and urging residents to verify their vaccination status. Public spaces such as schools, retail locations, and cultural institutions have been identified as potential exposure sites. Officials stress that vaccination remains the most effective way to prevent measles transmission and reduce the severity of outbreaks. Frequently Asked Questions (FAQ) Q1: Why is the South Carolina measles outbreak so large? The outbreak has been driven primarily by low vaccination rates, especially among children, allowing measles to spread rapidly in schools and communities. Q2: Is measles dangerous? Yes. Measles can lead to serious complications such as pneumonia, brain inflammation, and in severe cases, death—particularly in young children and unvaccinated individuals. Q3: Can vaccinated people still get measles? While rare, breakthrough infections can occur. However, fully vaccinated individuals typically experience milder symptoms and far fewer complications. Q4: How contagious is measles? Measles is one of the most contagious viruses known. It can spread through the air and remain infectious in enclosed spaces for hours. Q5: What can people do to protect themselves? Ensuring full vaccination, avoiding exposure during outbreaks, and following public health guidance are the most effective prevention strategies. Conclusion: A Warning Sign for Public Health The South Carolina measles outbreak serves as a stark reminder of the consequences of declining vaccination coverage. With case numbers now exceeding those seen in Texas in 2025, health officials warn that continued vigilance, vaccination, and community cooperation are essential to prevent further escalation. As measles cases rise nationwide, the situation underscores the importance of maintaining strong public health protections to safeguard children and communities alike. Post navigation Protests and Vigils Held Across Los Angeles After Deadly Minneapolis Shooting