The number of confirmed measles cases in the United States has reached 1,958 across 43 states as of December 16, 2025, according to a report from the Centers for Disease Control and Prevention (CDC). This increase of 46 cases in just one week raises concerns, especially as holiday travel begins. States with the highest case counts include Texas with 803, Arizona with 182, South Carolina with 142, Utah with 122, and New Mexico with 100. West Texas has been identified as the epicenter of this year's outbreak, but South Carolina is experiencing rapid spread in unvaccinated households, particularly in Spartanburg County. As of December 16, 168 individuals in South Carolina have been quarantined due to the disease. The state is urging employers to accommodate those under quarantine to prevent further transmission, as measles is highly contagious before symptoms appear. Regions along the Arizona-Utah border, notably with low vaccination rates, have also reported recent outbreaks. By July, the number of national measles cases had already surpassed the 2019 outbreak, marking this year as the highest in 33 years. The CDC previously declared the disease eradicated in the U.S. in 2000, but the ongoing outbreak and rising vaccine hesitancy threaten this status. Canada has already lost its eradication designation due to a prolonged outbreak. The CDC emphasizes the importance of ensuring that every child receives two doses of the measles vaccine to eliminate the disease, yet vaccination rates continue to fall short of the 95% threshold necessary to limit spread. Despite this alarming trend, the CDC has decreased its communication regarding measles on social media platforms in 2025. Reports indicate that the agency posted just 10 times from January to August, compared to a previous average of 46 posts in the same timeframe over the past four years. Health officials stress the need for improved communication and accessibility regarding vaccinations to reverse the rise in measles cases.