@_Anshuumaan_ No, other way round. PCR is blood – picks up fragments of viral RNA floating around from destroyed ce…

No, other way round. PCR is blood – picks up fragments of viral RNA floating around from destroyed cells. Cannot detect virions directly. Antibody test can determine if the virus is present in whatever's being tested, because the antibodies react. Perfectly usable on breath.
— Adam Gaertner (@veryvirology) April 9, 2020