The US is experiencing its worst measles outbreak since 2000, with over 1,277 confirmed cases by July 5th, surpassing the 2019 peak. The majority originated in west Texas, spreading to 39 states. At least 155 hospitalizations and three deaths have been reported. The highly contagious virus affects 92% of unvaccinated individuals exposed, highlighting the importance of vaccination. Texas, New Mexico, and Kansas have the highest case counts.

Prepared by Olivia Bennett and reviewed by editorial team.