State health officials said fewer than 30 of the cases identified by the state were considered "actively infectious." ...

Among the 561 measles cases in West Texas, state health officials said 550 involved individuals who were either unvaccinated ...

There have been 800 confirmed cases of measles across 25 states so far this year, according to the latest update from the CDC ...

The U.S. has 800 cases of measles nationwide as of Friday, and two more states identified outbreaks this week.

A measles outbreak has been declared in Pennsylvania. Earlier this week, the Erie County Health Department confirmed two additional cases of measles.

Montana public health officials have found five cases of measles in Gallatin County, the first cases of the disease in the ...