The test itself is in fact the usage. Perhaps the swab could be compared to the gun. The PCR test would be the equivalent of firing the hypothetical gun up one’s nostril.
Nonsense. PCR is used all the time in genetic research, having NOTHING to do with detecting COVID. My daughter used it for characterizing fungi for her PhD. I want it used to show that a grass species we found here is what i think it may be. Etc.
The way it is used for detecting COVID is what is invalid, not the test itself.