| prevalence of hepatitis a antibodies in eastern bolivia: a population-based study. | the seroprevalence of hepatitis a virus (hav) is changing from high to intermediate endemicity in several latin american countries, but the pattern in the andean latin american countries is unknown. a seroepidemiological survey (n = 436) of hav in schoolchildren living in the cochabamba region of bolivia was conducted in 2010. a questionnaire was completed by parents to obtain demographic, socio-economic, and housing data, and blood samples were collected. the overall prevalence of hav igg was 9 ... | 2013 | 23861034 |