The measles outbreak in western Texas has hit 481 cases as 59 newly identified infections were confirmed over the last three days, according to new data published Friday.

The measles outbreak that began in northwest Texas has now surpassed a combined 500 cases in Texas, New Mexico and Oklahoma.

The number of measles cases from the outbreak in West Texas is nearing 500 as close to 60 infections were reported in just three days. Here are key things to know about measles and the outbreaks in the U.