Hand, foot and mouth disease (HFMD) most often affects infants and children younger than age 5, the U.S. Centers for Disease Control and Prevention says.
Children that young lack immunity to the viruses that cause HFMD. the agency says.
Typical symptoms of the highly contagious disease include: fever, painful mouth sores and a rash on the hands and feet.
The CDC recommends these steps to prevent the disease:
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