South Carolina health officials declared the state's measles outbreak officially over on April 27, marking the end of the largest U.S. outbreak since 1991. The last confirmed case was reported on March 15, and no new cases linked to the outbreak emerged in the subsequent 42 days.
Outbreak Details and Response
The outbreak, which began in October 2023, infected 997 people over six months, primarily unvaccinated children. At least 21 individuals were hospitalized due to complications, including pneumonia and brain swelling. The outbreak was concentrated in Spartanburg County, where most schools had vaccination rates below the recommended 95% threshold.
Public Health Measures and Impact
Officials credited the outbreak's containment to timely investigations, contact tracing, and public cooperation in isolating infected individuals. Dr. Edward Simmer, interim director of the South Carolina Department of Public Health, described the response as a "textbook" example of outbreak management. Dr. Brannon Traxler noted that while many cases were mild, measles posed life-threatening risks, including long-term complications like immune amnesia and a degenerative neurological condition in young children.
National Context and Concerns
The South Carolina outbreak was part of a broader rise in measles cases nationwide. In 2023, three people, including two school-age children in Texas, died from measles. Health experts emphasize that measles remains a preventable disease through vaccination, but vaccination rates in some communities have fallen below protective levels.