Measles is a highly contagious disease. Here’s what to know about how to protect yourself and what’s happening in Texas and New Mexico.

A measles outbreak in Texas has jumped from two cases among unvaccinated children to 48. With childhood vaccine hesitancy on the rise, outbreaks are increasingly likely.

At least 58 cases have been confirmed. Health officials — who are scrambling to get a handle on the vaccine-preventable outbreak — suspect 200 to 300 people may be infected.