Hand-foot-and-mouth disease primarily affects children younger than age 10. Children in child care centers are especially susceptible to outbreaks of hand-foot-and-mouth disease because the infection spreads by person-to-person contact, and young children are the most susceptible.

Children usually develop immunity to hand-foot-and-mouth disease as they get older by building antibodies after exposure to the virus that causes the disease. However, it's possible for adolescents and adults to get the disease.

Aug. 26, 2011