The number of confirmed measles cases in western Texas grew to 146, and it is possibly spreading to the central part of the state and neighboring New Mexico, health officials said Friday.

Oklahoma has yet to record a case of measles, but cases are continuing to spread along the Texas border and Panhandle regions.

So far, the Centers for Disease Control and Prevention says there are cases in Alaska, California, Georgia, Kentucky, New Jersey, New Mexico, New York, Rhode Island and Texas. Twenty percent of those who contracted measles have had to be hospitalized and there’s one confirmed death.

The New Jersey Department of Health confirmed an initial measles case on Feb. 14 in an unvaccinated individual, and by Feb. 20, two additional cases were identified in people who had close contact with the original patient.

Cases in Texas and other states are on the rise, but most of the infected were not vaccinated. Here’s what to know about the very contagious disease and how immunity works.

As of Feb. 20, there were a total of 93 measles cases reported in eight states: Alaska, California, Georgia, New Jersey, New Mexico, New York City, Rhode Island and Texas, according to the Centers for Disease Control and Prevention. For comparison, 285 cases were reported in the U.S. in 2024.