PCR, no, antibody tests do. E.g. if you give blood with the Red Cross right now, they will do a basic antibody test that will react if you have had COVID or if

PCR, no, antibody tests do. E.g. if you give blood with the Red Cross right now, they will do a basic antibody test that will react if you have had COVID or if you have been vaccinated. If you test positive for that, they do a second test that will only react if you have been exposed to the real virus.