Cumulative incidence of first and subsequent sapovirus infections (A) and sapovirus-associated diarrhea (B) in a birth cohort of 100 children. A, Survival curves show cumulative incidence of first through fifth sapovirus infection during the first 2 years of life. B, Curves show the cumulative incidence of the first through fifth infection of sapovirus-associated diarrhea. Of the 100 children, 23 had 1 sapovirus infection and 59 had more than 1 infection (34 had 2, 20 had 3, 3 had 4, 1 had 5, and 1 had 6).