Overview
- South Carolina’s outbreak doubled in a week to 434 cases after 124 new infections since Friday, with 409 people in quarantine and contact tracing stretched by public exposure alerts including the state museum.
- Utah has 201 confirmed infections, 147 in the southwest district, with spread documented to Summit County where a student attended school while infectious.
- CDC data show about 95% of patients are unvaccinated or have unknown vaccination status, while two MMR doses provide roughly 97% protection against measles.
- At least 171 cases are confirmed across nine states early in 2026, with Georgia, Oregon and Virginia each reporting their first cases of the year.
- Public health officials say ongoing, linked outbreaks from 2025 raise the risk that the United States could lose its long-held measles elimination designation.