I really don’t know the specifics of the test but I have read that it means the test detected virus particles in the bloodstream, which can mean everything from you are about to die to you were exposed and your immune system successfully fought it off. So it means nothing really.
The tests are still the nasal swabs - they are supposed to show PRESENCE of the virus in the swab sample.
All these reports of Positive Test mean squat. The only useful stats are hospitalizations, extent of treatment(drugs, monoclonal antibodies), intubations, and deaths DUE TO pulmonary crisis.
But all we get are cases, cases, cases...