US Undertaking Unprecedented Effort on Measles Amid Elimination Uncertainty: WHO

‘There is no country that has done this before,’ one official said.

A sign about measles in Seminole, Texas, on April 9, 2025. Brandon Bell/Getty Images

The United States is working to drill down on whether outbreaks of measles are related, officials with the World Health Organization said on April 23.

U.S. officials are carrying out whole genome sequencing from samples to try to figure out whether the 2025 outbreak that spread in Texas is linked to other outbreaks, including an ongoing outbreak in Utah, the officials with the organization, known as the WHO, said at a press briefing.