Hepatitis A in internationally adopted children: screening for acute and previous infections.

Objective: The goal was to determine the prevalence of acute hepatitis A virus (HAV) infection and immunity among internationally adopted children.

Methods: Children seen at the International Adoption Center between September 25, 2006, and September 30, 2008, and were screened for HAV within 4 months after their arrival in the United States were eligible for the study. The age- and country-specific prevalence of acute HAV infection and immunity were determined.