Malaria dual antigen (Plasmodium vivax LDH and Plasmodium falciparum HRP-2) and peripheral smear, Typhi Dot IgM, Cytomegalovirus IgM, and viral hepatitis markers (HBsAg, anti-HCV antibody, IgA anti-HAV, and IgM anti-anti Hepatitis E antibody) were all negative. The gene discussed is CD40LG; the disease is viral hepatitis.