Overview
- The U.S. has reported over 800 measles cases across 27 states in 2025, including 624 cases and two deaths in a Texas-centered outbreak.
- Childhood MMR vaccination rates have dropped to 93%, below the 95% threshold needed to maintain herd immunity and prevent outbreaks.
- A new study projects measles could become endemic in the U.S. within 20 years, with 851,300 cases, 170,200 hospitalizations, and 2,550 deaths over 25 years at current vaccination levels.
- If MMR vaccination rates decline by 10%, the U.S. could see 11.1 million measles cases over the next 25 years; a 50% drop could result in 51.2 million cases and 159,200 deaths.
- Misinformation, including claims promoted by HHS Secretary Robert F. Kennedy Jr., continues to erode public trust in vaccines, complicating efforts to reverse the trend.