A positive test result could indicate that you may have had an immune response to the vaccine and have developed antibodies. However, this antibody test is not a measure of vaccine effectiveness and it’s also important to remember that these tests aren’t 100% accurate. It is also possible that the antibodies detected may be present because your body has mounted an antibody response after previous exposure to COVID-19. At the moment, we do not know if antibodies present in your blood will protect you from getting or transmitting COVID-19. Therefore, whatever your test result, you should continue to follow current government advice.