Texas health officials said Tuesday the state now has 58 confirmed measles cases. What is measles, how do you contract it and how deadly is it?

At least 58 cases of measles have been reported in West Texas within the last three weeks — marking the largest outbreak in the state in close to 30 years. The dozens of reported cases have mostly affected children,

Measles cases in Texas have nearly doubled in the past two weeks, making it the worst outbreak the state has seen in three decades. Now, cases are spreading into neighboring New Mexico.