Overview

• The U.S. is facing its largest measles outbreak in decades, with over 600 cases reported across 17 states since January 2025.
• Covenant Children's Hospital in West Texas has treated fewer than 10 children for vitamin A toxicity, linked to unproven measles remedies promoted by RFK Jr.
• Public health officials confirm that 97% of measles cases involve unvaccinated individuals or those with unknown vaccination status.
• The World Health Organization and CDC emphasize that vitamin A is not recommended for measles treatment in the U.S., where deficiency is rare, and warn of toxicity risks.
• Vaccination remains the most effective prevention method, with the MMR vaccine providing 97% efficacy with two doses.