Whether a blood count for antibodies is normal depends on which antibody is being tested, states MedlinePlus. When the testing is conducted to search for antibodies against a patient's own body tissues, the normal value is zero or negative, and in some instances, it is below a predetermined number.
The test that measures antibody levels in a blood sample is called an antibody titer. When the test is performed to determine whether a vaccine offers a patient complete protection from a disease, the specific value for that immunization determines what is normal, notes MedlinePlus. Since different laboratories have slight variations in their normal value ranges, patients need to discuss their test results with their doctors.