Based on symptoms. Both ailments require immediate treatment but both test protocols take a couple weeks to get results. The PCR test is under heavy scrutiny anyway with original recycle rates up in the 70s then down to 50s, 40,s 30,s sub 30s now I hear 6 to 16 with any higher recycle rates yielding meaningless results. So the doc says don’t even bother. After first treatment (antibiotic) for rocky fever you will likely never produce measurable antibodies for test verification but why wait? If you wait too long you could move on to Lymes disease. – which by the way is being successfully treated with ivermectin now.
So in the end if I produce covid antibodies then we know I had it but no info on rocky mtn… If no covid antibodies then it was rocky mountain fever.