South Carolina Measles Outbreak Highlights Risks to Unvaccinated Infants and Declining National Rates

South Carolina has reported nearly 1,000 measles cases in its ongoing outbreak, surpassing the previous year's total in Texas and marking the nation's worst in more than 35 years. The epicenter is Spartanburg County, where less than 90% of students have received required vaccines. Infants under 6 months, ineligible for the MMR vaccine, rely on herd immunity for protection.

Measles poses severe risks to young babies, including pneumonia, brain swelling, and death. In the outbreak, cases occurred among young children, though state officials have not disclosed specifics on infant cases or hospitalizations due to confidentiality.

Doctors in affected areas, such as Greer, have begun administering the first MMR dose as early as 6 months and the second dose ahead of the typical 4-to-6-year schedule.

in the outbreak region have expressed anxiety over exposing infants to public spaces like grocery stores and day cares.

At Miss Tammy’s Little Learning Center, which operates in the affected area, 18 parents withdrew children, and some forfeited deposits, leading to one teacher layoff. About 20% of the center's 300 children have vaccine waivers, primarily religious exemptions, despite state requirements for licensed facilities.

State health officials provided limited guidance during the surge, prompting facilities to monitor cases via social media and online searches.

No confirmed measles cases were reported at the center, but inquiries from parents about potential exposures increased. Religious exemptions in Spartanburg County have more than doubled since 2020, with 4% of school-age students statewide holding such exemptions in the 2025-26 school year.

A South Carolina bill proposes prohibiting vaccine requirements for children under 2, which would affect day care policies.