The number of reported measles cases in the United States has hit 1,288 in the first six months of this year, the most since the disease was declared eliminated in 2000.

Health experts say the true case count may be higher. Measles was considered eliminated in the U.S. in 2000, but if cases continue to rise at the rate it has, that status could change. The United States just reported its highest number of measles cases in more than three decades.

The measles outbreak that started in West Texas has now spread to nearly every US state and infected 1,288 people, according to NPR. That's the largest number of measles cases sin