Of the 19.9 million children who either have no vaccines or only partial DTP vaccination coverage, 55% live in 10 countries.
The new cases are part of a national surge fueled by multiple factors, including a large outbreak in West Texas, illnesses related to international travel, and a growing number of unvaccinated people.
So far this year, 1,288 cases have been reported from 39 states, and 88% have been part of 27 outbreaks.
With brisk activity in Canada, Mexico, and the US, cases in the Americas region are up 29-fold compared to a year ago.
New Mexico reported more infections from a county where an outbreak was reported at a jail.
For the 2024-25 school year, only 87% of Kentucky kindergartners were fully vaccinated against measles.
The announcement comes a week after New Mexico officials reported measles in a wastewater sample collected in the area, hinting of an undiagnosed infection.
Washington state has now recorded 10 measles cases in 2025.
Also, the group recommends Merck's RSV preventive for babies and weighs in on the upcoming season's flu vaccines.
Also, Utah now has 3 measles cases in unvaccinated adults.