The U.S. measles outbreak, which started in the state of Texas, now appears to be spreading across international borders. Health officials in Mexico say 22 cases have been confirmed — the majority of them in Chihuahua state, which shares a border with Texas. The infections, they say, were imported. 

The latest numbers from the U.S. Centers for Disease Control and Prevention shows 308 cases in more than a dozen states. With more cases now reported in the first three months of 2025 than the whole of last year. Toni Waterman reports.

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