Relative to what? If the Covid RNA isn't present, it's undetected. Being sensitive is GOOD.
False.
Good grief. The PCR setup to detect ONLY Covid RNA - if present, will do exactly that. DNA from "microscopic anything" as in bacteria will not have the appropriate primer/probes stick. Thus, the result returned for the "microscopic anything" will be negative.
Likewise a PCR test setup to detect the fungi of your choice will detect only that fungus, and not Covid.
Out of posts. You'll have to wait for tomorrow on the nonsense about Covid affecting the immune system permanently.