Measles spreads in US state of South Carolina; cases hit 646

According to the DPH, currently, 538 people are in quarantine and 33 are in isolation, with the latest quarantine period set to end on February 23, Xinhua reports.

The department also noted that at least 15 schools—including elementary, middle, and high schools—as well as two universities, have students in quarantine due to the outbreak.

Health officials identified measles exposures at two supermarkets in the upstate region and advised people who may have been exposed, particularly those without immunity, to monitor for symptoms, which typically appear seven to 12 days after exposure.

Nationwide, a total of 171 confirmed measles cases have been reported in 2026 as of Jan. 13, according to the U.S. Centers for Disease Control and Prevention (CDC). The United States reported 2,242 confirmed measles cases in 2025, the highest annual total since 1992, CDC data showed.