Measles is surging. Last week the U.S. recorded 90 cases, making this year's outbreak the second largest in more than two decades.
So far this year, the U.S. has confirmed 555 measles cases, the Centers for Disease Control and Prevention announced Monday. That's 50 percent higher than the total number recorded last year, even though we're only about a quarter of the way through 2019.
And the virus isn't slowing down.