Antibody screening determines the presence of pathogenic microorganisms in the body that correspond to certain antibodies, as well as the presence of some protective antibodies in the body. There are many types of antibody screens, and checking for antibodies requires a blood sample to be collected for testing. Antibodies to Helicobacter pylori can be detected if the bacterium is tested for. If it is positive, you are considered to be infected with H. pylori. Testing for HIV antibodies helps to diagnose HIV-infected individuals, and this test is suggestive of a disease diagnosis. Checking the hepatitis B surface antibody titer assesses the body’s immunity to hepatitis B after vaccination. Although antibody screening plays a good supporting role in diagnosis, it usually needs to be combined with the patient’s clinical symptoms and other auxiliary tests to make a definite diagnosis. It is recommended that patients go to a regular hospital and under the guidance of a professional doctor for antibody screening.