Impact of routine hepatitis B immunization on the prevalence of chronic hepatitis B virus infection in the Marshall Islands and the Federated States of Micronesia.

Background:To evaluate the impact of routine hepatitis B (HB) vaccination on the prevalence of chronic hepatitis B virus (HBV) infection among children in Pacific Island countries where HBV infection was highly endemic, we conducted HB serosurveys during 2000 to 2007 among women of childbearing age