More than 3,500 cases of pertussis cases have been reported in Texas so far this year, already reaching a 11-year high even though two more highly infectious months are left in the year.

The virus has been spreading for nearly a year in the U.S. — a key factor in determining whether a country loses its measles elimination status.

North America's three biggest measles outbreaks continue to balloon, with more than 2,500 known cases; three people have died in the U.S. and one in Mexico. Dr. Hector Ocaranza knew El Paso would see measles the moment it began spreading in West Texas and ...

The Louisiana Department of Health on Monday reported the state's third measles case of the year and warned that those who were at the New Orleans airport the night before may have been exposed.

Only one person has newly tested positive for measles in South Carolina this week, but an Upstate outbreak could continue to spread, especially with the upcoming holidays, according to the state Department of Public Health.