One-fifth of states have active measles outbreaks as confirmed cases nationwide keep ticking up, according to the U.S. Centers for Disease Control and Prevention. Measles is caused by a highly ...

The CDC has issued a travel warning for Americans heading to China as the country battles an outbreak of chikungunya virus, with thousands of people infected by the mosquito-borne illness. What is ...

The U.S. logged fewer than 20 measles cases this week, though Iowa announced the state’s first outbreak Thursday and Georgia confirmed its second Wednesday. There have been 1,214 confirmed measles ...

Texas' measles outbreak shows signs of slowing, with fewer than 10 newly reported cases in the last week, but experts say it's not fully over. “This outbreak does appear to be leveling off, but the ...