US reportedly loses longstanding measles elimination status as cases surge nationwide

The US has reportedly lost its measles elimination status after 26 years, meaning the virus has spread continuously within the country for at least 12 months. The reported decision marks a public health setback, as sustained transmission puts people with low immunity, including infants too young for vaccination, at greater risk.

The US recorded 5,412 confirmed cases by 12 November 2026, more than twice the 2,289 cases reported in all of 2025. Measles can infect up to nine in ten nearby people without immunity and remain airborne for up to two hours; two MMR vaccine doses are about 97% effective. Health groups say restoring elimination status will require stronger local public health support, timely surveillance and easier access to vaccination.