PCR/NAA has a much higher false positive rate. Direct antigen test is 100% specific, 97% sensitive, at least that’s what Quidel mfr tells us. It’s a fticken head/chest cold. It’s not going away, vaccines are superfluous, lockdowns and masks dangerous (they weaken our immune system), get over it.
My mistake, Elon said his in-office test (x4) was an “antigen” rapid test by “BD” (not an antibody test):
https://twitter.com/elonmusk/status/1327125840040169472