South Carolina Declares End to Measles Outbreak

Health officials in South Carolina announced on Monday that the measles outbreak in the state has officially ended, concluding a significant public health challenge that affected 997 individuals.

This outbreak, which began in October 2025, was the largest of its kind in the U.S. since measles was deemed eradicated in 2000.

The seriousness of the situation was underscored by the hospitalization of 21 individuals, some of whom experienced severe complications like pneumonia and encephalitis.

To confirm that the virus was no longer present, health authorities waited 42 days—equivalent to two incubation periods—after the last reported case on March 15 before declaring the situation safe.

“Are we breathing a sigh of relief? Yes,” stated Dr. Brannon Traxler, chief medical officer at the state Department of Public Health. “But we don’t just throw a big party and forget about measles.” The reality is, preventative measures must still be a priority.

Measles poses unique threats beyond immediate symptoms; it can lead to “immune amnesia,” which diminishes a child’s existing antibodies, making them more vulnerable to future infections. In rare instances, survivors may develop a severe neurological condition known as subacute sclerosing panencephalitis (SSPE), which can cause chronic brain damage and is typically fatal, manifesting years after the initial infection.

The outbreak also impacted the education sector, with 874 students across 33 schools placed under quarantine, resulting in approximately $2.1 million in response costs for the state.

Public health professionals believe that rising case numbers nationwide, alongside local transmissions, may have made some parents reluctant to vaccinate their children. Meanwhile, measles outbreaks are still occurring in other parts of the U.S., including states like Florida and Utah.