The measles outbreak centered in West Texas – one of the largest and deadliest in centuries – has ended, state health officials announced on Monday.

No new cases have been reported in the counties that had previously shown evidence of ongoing transmission in more than 42 days, according to the announcement. An outbreak is considered to be over after this amount of time because it suggests that the two incubation periods have passed – the time it would take to get sick after an exposure – without any transmission.

Texas has confirmed at least 762 cases of measles associated with the outbreak since late January, including nearly 100 hospitalizations. More than two-thirds of the cases were in children, and two school-aged children from Texas died – the first deaths from measles in the Un

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