From NPR.

South Carolina is reporting 789 confirmed cases of measles, surpassing the West Texas outbreak last year that resulted in the deaths of 2 school-age children. As NPR’s Maria Godoy reports, the outbreak is now the largest the U.S. has faced in nearly 30 years.

Public health officials have reported 89 new confirmed cases in South Carolina since last Friday. The vast majority are in unvaccinated kids and teens. The outbreak is centered in Spartanburg County, where the vaccination rate among students is 90% overall — lower than the 95% threshold needed to prevent outbreaks.

There are currently 20 people in isolation and 557 others in quarantine. That includes students in at least 19 elementary, middle and high schools in the northwest part of the state. Officials say at least 18 people, both adults and children, have been hospitalized with complications from measles since the outbreak began in October.