Serological tests were performed, where the following results were negative: IgM antibody for hepatitis A, superficial hepatitis B antigen, anti-IgM antibodies against hepatitis B, anti-hepatitis C antibodies, and IgG and IgM antibodies against hepatitis E; others such as IgG and IgM antibodies against herpes virus 1 were reported in 2.19 and 0.07 index (negative: lower 0.6 and 0.8 index, resp). The gene discussed is CD40LG; the disease is hepatitis A virus infection.