United States is experiencing its worst measles outbreak in roughly 35 years, with cases rising sharply across multiple states. The resurgence is being driven largely by declining vaccination rates, leaving some communities vulnerable to a disease that had previously been eliminated from routine U.S. transmission.
Health officials are urging people to ensure they are fully vaccinated, particularly children and those traveling to areas with active outbreaks. The surge highlights how quickly measles can spread when vaccination coverage falls and raises renewed concerns about protecting vulnerable populations from a highly contagious disease.