Arizona health officials say there are four confirmed linked measles cases, making it another state with an outbreak.

There was an uptick in measles cases across the U.S. over the last week, the Centers for Disease Control and Prevention reported Friday, though the spread of the highly contagious illness appears ...

The U.S. logged fewer than 30 measles cases this week as Ohio health officials confirmed three outbreaks in two counties were ...

With one-fifth of states seeing active measles outbreaks, the U.S. is nearing 900 cases, according to figures posted Friday by the U.S. Centers for Disease Control and Prevention. The CDC's ...