Immunity tests are performed to identify and understand the causes of poor body resistance and immunity. There are many immunity tests, such as immunoglobulin complete set, thyroid function five, thyroid function three, tumor marker four, prostate specific antigen, male and female sex hormones, etc. In this immunoglobulin complete set, there are immunoglobulin IgG quantitative determination, immunoglobulin IgA quantitative determination, immunoglobulin IgM quantitative determination, complement C3 determination, complement C4 determination, etc. It is mainly used for the detection of rheumatoid arthritis, systemic lupus erythematosus, chronic hepatitis in its active stage, nephrotic syndrome, autoimmune disease, primary gammaglobulin-free blood, secondary immunodeficiency, acute hepatitis, tissue damage, dermatitis, myocardial infarction and other diseases. Thyroid function includes three judgments such as total triiodothyronine T3, total thyroxine T4 and thyrotropin, which are used to check basic thyroid function and determine whether there is hyperthyroidism, hypothyroidism or other abnormalities.