An antibody test detects the antibodies produced by your body in cases where you have had suffered from Covid-19 and recovered. The antibody test is performed on a venous blood sample. It is meant to detect either the type immunoglobulin M (IgM) or type immunoglobulin G (IgG) antibody. A positive result indicates that the person has had suffered from Covid-19 and the body’s immune system has responded by producing antibodies.
The test may also be conducted if one believes one has been exposed to the virus but hasn’t shown symptoms. Since this is an antibody test, it will only turn up positive if your body has developed antibodies yet. So, if you are in the early stage of infection, then this may not yield results. If your antibody test turns out positive, it means you were infected in the past but have now recovered and the body has had produced antibodies.