Health authorities in South Carolina announced Monday that the state’s devastating measles outbreak has officially ended after going 42 days without any new cases connected to the epidemic.
The outbreak infected 997 individuals with the highly contagious, vaccine-preventable illness starting in October, making it the most severe measles crisis the nation has experienced in more than three decades. At least 21 patients required hospitalization according to voluntary reporting data, and state officials estimate the response efforts carried a $2.1 million price tag.
“The outbreak was predominantly contained to one area of one county and never went statewide, thanks to timely investigations, identification of those exposed, and people’s willingness to stay home,” stated Dr. Edward Simmer, who serves as interim director of the South Carolina Department of Public Health.
Measles ranks among the most highly transmissible viruses in medical science. While most patients recover after experiencing high fever, persistent cough, runny nose and the characteristic rash, serious complications can occur. Young children and immunocompromised individuals face risks of pneumonia, brain inflammation, and death. The disease can also trigger long-term health issues for survivors. Two vaccine doses provide 97% protection and are considered safe.
The epidemic was concentrated in northwestern Spartanburg County and represented the most rapidly spreading measles outbreak the country has witnessed in recent decades, according to state health authorities. Public health teams verified over 650 infections during January alone, quickly surpassing the 2025 West Texas outbreak that affected at least 762 individuals and resulted in two pediatric fatalities.
However, cases declined faster than experts anticipated, bringing relief to medical professionals and health workers. Dr. Brannon Traxler, the state health department’s chief medical officer, suggested several factors may have contributed to this trend last week. The outbreak may have naturally subsided as more people contracted the illness, but vaccination rates also improved significantly.
Despite initial reluctance, public health teams, medical practices, and pharmacies delivered nearly 82,000 measles vaccines between October and March. This represented more than a 30% jump compared to the previous year’s same timeframe. Spartanburg County experienced a dramatic 94% surge in vaccination rates.
The public health department implemented aggressive containment measures, distributing nearly 2,300 quarantine notifications, conducting over 1,670 case investigation phone calls, and collaborating with seven school districts to quarantine 874 students.
Measles transmission persists across the country. The United States has recorded 1,792 cases this year so far — representing nearly 80% of 2025’s record-breaking numbers — along with 22 new outbreaks. Florida has documented 134 cases this year while Texas reports 180, based on Centers for Disease Control and Prevention data.
The most pressing concern involves an outbreak that began along the Arizona-Utah state line and has now expanded throughout much of Utah. Since August, 607 people have contracted the disease in Utah, while Mohave County, Arizona has documented 282 cases. Genetic testing suggests the outbreak may have started six weeks earlier than initially detected and could be significantly larger than current reports indicate, according to research shared at a recent CDC conference.
While case numbers have decreased somewhat, it remains premature to predict an end to the Utah outbreak, explained Dr. Ellie Brownstein, a Utah pediatrician and incoming president of the state’s American Academy of Pediatrics chapter. State records show southwestern Utah continues reporting the highest case count at 258, though all 13 local health districts have documented at least one infection.
“It has marched through the state and is everywhere,” Brownstein noted.
South Carolina health workers have only brief respite following their outbreak’s conclusion. A case connected to international travel in Saluda County, located west of Columbia, emerged last week and resulted in 41 people requiring quarantine.
“We are certainly not letting our guard down, and I don’t think that South Carolinians who are still vulnerable to the virus, that don’t have immunity, should let their guard down,” Traxler emphasized.
The virus has experienced a resurgence throughout the Americas following a major outbreak that originated in Canada during fall 2024. Childhood vaccination rates against measles have declined for years across the United States as increasing numbers of parents choose to skip required school immunizations. International health officials will decide in November whether the U.S. has forfeited its measles elimination status, which has been maintained since 2000.
Dr. Martha Edwards, who leads the South Carolina chapter of the American Academy of Pediatrics, described feeling both grateful and frustrated about the outbreak’s end.
“I’m angry that many children and their parents had to worry about contracting or suffering through a disease that should have been nearly 100% preventable,” she expressed.
