Rabies vaccine antibodies can be tested by drawing blood. Generally, the presence of antibodies can be detected two weeks after the rabies vaccination. If there is a suspicion of a problem with the quality of the vaccine or if the patient is unsure, testing can be done at the local Center for Disease Control and Prevention, which currently does not conduct a rabies vaccine antibody testing program. If a person receives a full course of the vaccine and is exposed again within six months, the antibody test is also required. Based on the results of the test, the hospital will determine if another rabies vaccination booster is needed. The cost of a rabies vaccine test is usually not high, around a few dollars, so if there is a problem with the test, it is important to get a rabies booster shot again. However, each place will have some variation, and the specific cost is to consult the relevant local unit.