A breakthrough in AFM? Doctors say respiratory virus is culprit

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There is no known cure for acute flaccid myelitis (AFM), a polio-like condition that can leave children paralyzed. But researchers believe they may have made a potential breakthrough. NBC News medical correspondent Dr. John Torres talks about the latest news, saying clinicians and researchers indicate enterovirus D68, or EV-D68, seems to be the cause of AFM.