Spatial clustering of undervaccination amplifies local measles transmission but limits geographic spread: South Carolina, 2025-2026
The 2025 measles outbreak in South Carolina, the largest in the United States in over two decades, produced 997 confirmed cases, predominantly among school-aged children in an under-vaccinated community in Spartanburg County. To support the South Carolina Department of Public Health (DPH) measles response, we developed...