A measles outbreak in Pennsylvania has become the largest one experienced by a state in more than three decades as the number of reported cases crosses into four-digit territory.

A measles outbreak in Pennsylvania has topped 1,000 cases, with neighboring New York declaring a disaster emergency and ...

Pennsylvania has surpassed 1,000 measles cases this year, state health officials said Monday, making it the largest state outbreak in more than three decades.

Federal officials have confirmed seven active cases of measles at an Arizona immigration detention center, prompting quarantines and restrictions on visitation. The measles outbreak affects the ...

Nueces County officials say a mosquito pool collected in Bishop tested positive for West Nile virus. Residents are urged to ...

State public health officials are warning about a possible measles exposure across multiple California counties after an infected passenger traveled across the country on trains and buses. The ...

Lubbock's public health director was honored for her leadership during the historic West Texas measles outbreak and her continuing work to protect communities from vaccine-preventable diseases.