Prevalence of antibodies against hepatitis A virus (HAV) in a population of Mexican children

: We studied by ELISA test 450 healthy children looking for IgG and IgM antibodies against virus A hepatitis. 376/450 (86.3%) showed IgG antibodies. 50% of children under one year were positive. At 3 years of age 80% of children from this study were with antibodies IgG and 96% of children at 10 years of age were positive. Only 9 children showed antibodies IgM.