What's Happening?
South Carolina is currently experiencing the largest measles outbreak in the United States since the disease was declared eliminated over two decades ago. As of the latest reports, 789 cases have been
confirmed, surpassing a previous outbreak in Texas that ended with 762 cases. The outbreak began in October 2025 and has rapidly expanded, with more than 600 cases reported in 2026 alone. The majority of those affected are unvaccinated children, with over 700 cases involving individuals who had not received the two recommended doses of the MMR vaccine. The outbreak has led to 18 hospitalizations, though no deaths have been reported. The state health department has also placed 557 individuals in quarantine due to potential exposure. The outbreak has spread to other states, with cases linked to South Carolina reported in North Carolina and Washington.
Why It's Important?
The outbreak poses a significant public health challenge and threatens the U.S.'s measles elimination status, which could be revoked by the Pan American Health Organization. The resurgence of measles highlights the critical role of vaccination in preventing disease spread. The outbreak underscores the consequences of declining vaccination rates, particularly in communities with low immunization coverage. Public health officials emphasize the importance of achieving a 95% vaccination rate to prevent measles transmission, given the virus's high contagion potential. The situation also reflects broader debates on vaccination policies and personal freedoms, as some communities choose not to vaccinate, impacting public health efforts.
What's Next?
Efforts to contain the outbreak include promoting vaccination through mobile health units and public health campaigns. The CDC and state health officials are working to increase vaccination rates, particularly in areas with low coverage. The potential loss of measles elimination status could prompt policy reviews and increased public health interventions. The situation may also influence future discussions on vaccination mandates and public health strategies to prevent similar outbreaks. The CDC continues to monitor the situation and provide guidance to affected states.
