- Any active viral hepatitis other than hepatitis C virus infection, as defined by the presence of IgM antibody to Hepatitis A Virus (HAV) within 30 days of enrollment, or Hepatitis B Virus Surface Antigen (HBsAg) positivity, or positive plasma HBV DNA by PCR methodology when HB core antibody is the only serologic marker of HBV infection within 30 days of entry.