With one-fifth of states seeing active measles outbreaks, the U.S. is nearing 900 cases, according to figures posted Friday ...

The US has now hit nearly 900 measles cases across 30 states this year – a more than threefold increase from the total number ...

The measles rash usually doesn’t appear for more than a week after someone has been exposed. Other symptoms are better early indicators of a potential measles case, health experts say.