Immunoserology tests for evaluation for etiologies of hepatitis were negative for hepatitis A immunoglobulin M antibody (HAV IgM), hepatitis B surface antigen (HBsAg) and hepatitis C virus (HCV), HIV Ab, herpes simplex virus immunoglobulin M and G (HSV - IgM and IgG) antibodies, Epstein-Barr virus Deoxyribonucleic acid (EBV DNA) and cytomegalovirus Deoxyribonucleic acid (CMV DNA). The gene discussed is CD40LG; the disease is hepatitis A virus infection.