The abnormal infectious disease quadruple test should be looked at to see which one it is, and then targeted treatment should be given based on further test results. At present, the four tests for infectious diseases are more common tests in the infection departments of major hospitals, and are usually required before hospitalization, surgery, blood transfusion, etc. The four tests are specifically for HIV antibody, syphilis antibody, hepatitis B surface antigen, and hepatitis C antibody. The four tests for infectious diseases specifically refer to the HIV antibody, syphilis antibody, hepatitis B surface antigen, hepatitis C antibody test, which is the basic screening for the four relatively highly infectious infectious diseases of AIDS, syphilis, hepatitis B, hepatitis C, and is able to initially screen out patients who may be infected with these four diseases. When an abnormality is detected in one of the four infectious disease tests, it is important to determine which one or more of the four tests are abnormal and require further testing. If the patient is HIV positive, a blood sample will be sent to the CDC for a confirmatory HIV test and final confirmation will be made by the CDC. In the case of syphilis positivity, further testing is also needed to determine if the infection is a past one. In the case of Hepatitis B surface antigen positivity, further testing for Hepatitis B virus DNA is required, and in the case of Hepatitis C antibody positivity, testing for Hepatitis C virus RNA is required. When abnormalities in the four infectious disease tests are detected, further tests should be conducted under the guidance of a medical professional.