Viral hepatitis requires relevant hepatitis markers, such as hepatitis A antibodies IgG and IgM for hepatitis A, and for hepatitis B, the "hepatitis B two and a half pairs" test is conducted to check for surface antigens. If the surface antigen is positive, it indicates a hepatitis B virus infection; if negative, there is no hepatitis B virus infection. Hepatitis C is primarily screened through hepatitis C antibodies; if the screening is positive, further testing for hepatitis C virus RNA is needed. Hepatitis E mainly involves testing for hepatitis E antibodies IgG and IgM.