CIDRAP Op-Ed: Call it what it is—the US has lost its hold on measles elimination (July 24, 2026)
Clearly, the data point to continuous spread
The timeline makes this hard to wave away. The massive outbreak in West Texas began on January 20, 2025, which puts the country well past the one-year mark. Seven months later when that outbreak, which resulted in
762 cases, was declared over, measles cases did not stop so much as the outbreaks relocated to other parts of the state and country.
The strongest evidence that this is continuous spread, rather than reintroduction, comes from the virus itself. In a recent
analysis of more than 1,800 whole-genome sequences, ProPublica traced a distinctive set of mutations from the earliest Texas cases through the Utah outbreak, which began in June 2025, and into at least four other states.