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Just as antibiotics breed resistance in bacteria, vaccines can incite changes that enable diseases to escape their control. Researchers are working to head off the evolution of new threats. Andrew Read became a scientist so he could spend more.

New yorkUnited statesPennsylvania state university centerPennsylvania state universitySouth walesMarc lipsitchPaul ewaldChris gainesRichard malleyDavid kennedySasha maslovChris cairnsMatthewj jonesVicki barclayUs department of agricultureUs centers for disease