Testing for both IgG and IgM antibodies will help determine if you have been infected with the Covid-19 virus over the last 3-4 weeks or earlier and have some degree of immunity, or you are in the mid-to-late phase of an active infection, even if you have had no symptoms.
(Confirmation of active Covid-19 infection and spreading status still requires a deep nasopharyngeal swab test performed at specialized center)
