seroepidemiology of hepatitis a virus in children of different age groups in tehran, iran: implications for health policy. | hepatitis a is one of the most frequently reported vaccine-preventable diseases throughout the world and remains endemic in many areas. studies in various communities have shown that hepatitis a virus (hav) prevalence rises with age. the current data regarding hepatitis a epidemiology in iran is limited. the aim of this study was to determine the seroepidemiology of hepatitis a in children of different age groups in tehran, iran. | 2010 | 20541138 |