Measles Outbreak Grows in South Carolina
The measles outbreak in South Carolina continues to escalate, with 847 confirmed cases reported since October. This number has already exceeded that of a similar outbreak in Texas that began just over a year ago.
Dr. Linda Bell, the state epidemiologist for South Carolina, noted that while the Texas outbreak developed over several months, South Carolina’s cases have surged in just 16 weeks.
“It’s unfortunate that we’ve reached this milestone so quickly,” she said during a recent press conference. The state documented 58 new cases within just a few days, raising concerns about the trajectory of measles in South Carolina.
This current outbreak is a challenging moment for the U.S. in its efforts to control measles. It comes amidst a backdrop of actions by the Trump administration that have raised doubts about vaccine effectiveness.
There’s also a looming threat of the U.S. losing its designation as a country that has eliminated measles, which is defined as a year without a continuous chain of transmission. The timer for this began in January 2025 with the Texas outbreak.
Assessing Elimination Status
The status of measles elimination is determined by the Pan American Health Organization (PAHO), which reviews evidence to assess whether outbreaks in the U.S. are connected to the Texas outbreak. Collecting necessary epidemiological data and analyses is a time-consuming process.
Even if PAHO finds that the outbreaks are separate, the U.S. risk losing its elimination status unless it can demonstrate efficient control of measles spread, according to Dr. Demetre Daskalakis, an infectious disease expert.
Vaccine Controversies
When asked about the potential fallout from losing elimination status, Dr. Ralph Abraham of the CDC downplayed its significance, emphasizing a commitment to personal and religious freedoms that might affect vaccination choices.
However, experts argue that the choice not to vaccinate is a major factor driving the current outbreaks. Misinformation regarding vaccine safety is a key issue undermining public trust.
Daskalakis maintains that “elimination is already lost” due to the U.S. struggle to control measles transmission effectively. PAHO is expected to review the elimination status this spring.
The Bigger Picture
Dr. Anna-Kathryn Burch, a pediatric infectious disease specialist in South Carolina, expressed her distress over the growing outbreak, predicting that numbers will likely continue to climb in the coming months.
Measles is extremely contagious, surpassing even diseases like Ebola. An infected person can spread the virus days before displaying symptoms, leading to potentially rapid transmission.
Vaccination remains the best defense. The measles, mumps, and rubella vaccine has a 97% effectiveness rate when two doses are administered. Yet, vaccination rates in Spartanburg County trail behind at 90%, compared to the ideal threshold of 95% in communities.
The broader picture points to declining vaccination rates across the nation. According to the CDC, only 92.5% of kindergartners had received the measles vaccine in the 2024-2025 school year, with some areas boasting even lower numbers. For experts, this creates the perfect environment for outbreaks, with just one case needed to ignite a larger problem.
