Measles Outbreak in South Carolina: Rising Vaccine Exemptions

Why this matters: This outbreak highlights the critical importance of vaccination in preventing the spread of highly contagious diseases like measles. Rising vaccine exemptions can lead to outbreaks that endanger public health, especially for vulnerable populations.

The measles outbreak in South Carolina began in October and has accelerated in recent weeks. State epidemiologist Linda Bell notes exposures are occurring in public places like churches, restaurants, businesses, and healthcare settings. The increase in nonmedical vaccine exemptions, driven by philosophical or religious reasons, contributes to lower overall immunity levels.

Research indicates a growing trend of nonmedical exemptions across U.S. counties since the pandemic. Even with high overall vaccination rates, pockets of lower vaccination coverage create vulnerability. The Clemson University case demonstrates the potential for spread within a highly vaccinated population, as nearly 98% of main campus students have provided proof of immunity, but that still leaves a portion of the student body vulnerable.

The CDC reports measles cases in multiple states, including Arizona, Florida, Georgia, North Carolina, Ohio, Oregon, Utah, and Virginia, indicating a broader national issue with vaccine coverage. The U.S. reported a high number of measles cases in 2025, and at least 171 measles cases have been reported in the first two weeks of 2026.

How to Prepare:

Who This Affects Most:

Measles is extremely contagious; a single case can infect up to 18 other people.

A vaccination rate of 95% is needed to prevent measles outbreaks.

If you are not vaccinated, get the MMR vaccine within 72 hours of exposure. Contact your healthcare provider for guidance.

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