Vaccine critics have downplayed the role of measles in two Texas girls’ deaths, peddled unproven measles treatments and exaggerated the dangers of the vaccine.

The Texas Department of State Health Services said “fewer than 25 of the confirmed cases” are believed to be actively infectious as of Tuesday, April 15, based on when their rashes appeared. The counties with “ongoing measles transmission” are Cochran, Dallam, Dawson, Gaines, Garza, Lynn, Lamar, Lubbock, Terry and Yoakum.

The CDC is struggling to respond to the Texas measles outbreak. The U.S. has reported more than 700 cases in 25 states.