Measles is spreading in West Texas and New Mexico. Isolated cases mostly linked to international travel have been reported in about a dozen other states.
Measles continues to spread in West Texas and New Mexico. About 300 cases have been reported, since the outbreak began in January - but the actual number is likely higher.
The communities where measles continues to spread people are largely unvaccinated.
At the same time some isolated measles cases have been reported in a dozen other states - largely linked to international travel.
In most of the U.S., vaccination rates are still high enough to stop a major outbreak. But if they continue to fall, we could see long-term consequences of measles in the future.
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This episode was produced by Mallory Yu and Connor Donevan. It was edited by Jeanette Woods, Nadia Lancy, Jane Greenhalgh and Courtney Dorning. Our executive producer is Sami Yenigun.