It is necessary to decide whether antibody testing is needed according to the disease under the guidance of a doctor, and it is wrong to say that “antibody testing is not recommended”. Antibody testing includes antibody testing for non-infectious diseases and antibody testing for infectious diseases. Antibody testing for non-infectious diseases is mainly for autoimmune diseases, such as systemic lupus erythematosus, for which antibody testing is an important basis for diagnosis. Antibody testing is needed for syphilis infection in infectious diseases to determine whether it is infected or not, and Hepatitis B virus testing is also needed to check for Hepatitis B surface antibody and e antibody. If the patient suffers from infectious diseases, it is recommended to go to the hospital in addition to antibody testing, with other testing methods, such as blood culture, sputum culture or nucleic acid testing, etc., which can improve the accuracy of clinical diagnosis.