Rinderpest, a devastating cattle disease, has not been seen in the wild for a decade, but it lives on in scores of labs. Twelve months after the world celebrated the success of a years-long vaccination campaign that made rinderpest only the second disease after smallpox to be eradicated, animal-health authorities are turning to the next task: making sure that a lab release — accidental or intentional — doesn’t lead to a resurgence.
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