| [characteristics of the development of humoral immunity to hepatitis a in children's day care centers]. | solid-phase enzyme immunoassay was used to study changes in the frequency and levels of antibody to hepatitis a virus (anti-hav) in 567 children in 20 isolated groups of 5 day-care centers of the town of kemerovo. the observation period included the seasonal rise in hepatitis a incidence. an increase in the portion of seropositive children occurred in the groups where manifest or asymptomatic infection with hepatitis a existed. the number of seropositive subjects in the groups where the children ... | 1988 | 2842960 |