[singlon]

ART can test negative. But if conduct PCR test, it is more accurate. Even those who got Covid can get Negative ART test later when recovered. But the PCR test can still be positive. 

So far cannot find any answer for how long those recovered from Covid can test negative for PCR test. The only clue is that the loss of senses like smell and taste are still there.

That might be the reason why most of the airlines required a PCR test.

arr PCR might be worse.
want up also can
want down also can
It is the NUMBER
No sample of the cannot use the word virus as it is simply poison or exosomes
we use pathogen. u know something codes with proteins shell.