Immunity five tests mainly include lgA, IgM, IgG, complement C3 and complement C4. 1. IgA: It refers to the increased value of immunoglobulin A. It is seen in tuberculosis disease, systemic lupus erythematosus, liver disease, and if there is immunodeficiency disease, this value tends to decrease. 2. IgM: This refers to immunoglobulin M. Increased values indicate the possibility of mycoplasma pneumonia, intrauterine infections, and decreases in acquired antibody deficiencies and burns. 3. IgG: This refers to immunoglobulin G. Increased values can be seen in connective tissue diseases and can be decreased when treated with immunosuppressive drugs. 4. Complement C3 and Complement C4: Increased values are seen in inflammatory or infectious diseases, such as myocardial infarction, joint inflammation, and decrease in chronic active hepatitis. If you need to check the five items of immunity, it is recommended to go to the internal medicine department, rheumatology and immunology department of regular hospitals and other related departments for detailed consultation, and follow the doctor’s instructions to improve the examination.