The United States is encountering a severe measles outbreak with 1,288 confirmed cases reported since January 2025, surpassing figures from 2019. Childhood vaccination rates have declined, contributing to the rise in cases. Measles, a highly contagious disease, spreads through coughing and sneezing, and there is no cure; however, vaccination can provide protection. The Johns Hopkins Bloomberg School of Public Health maintains a U.S. Measles Tracker for monitoring current outbreaks. Vaccination, particularly the MMR vaccine, is critical for prevention, especially for children aged 12 months to 12 years.
The Centers for Disease Control and Prevention (CDC) reported 1,288 confirmed measles cases across 38 states since January 2025, marking the worst outbreak in three decades.
Medical researchers have noted a downward trend in childhood vaccination rates, which has contributed to the rising incidences of measles in recent years.
Measles is highly infectious and spreads through airborne droplets from coughs and sneezes. Vaccination is the primary method of prevention.
The U.S. Measles Tracker from Johns Hopkins Bloomberg School of Public Health helps monitor outbreaks and indicates locations of both local and imported cases.
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