Testing For The Flu

[rickymouse]

Covid only attaches to certain receptors called ace2 and they are found in the upper nose canal and in the bronchial tubes and lungs.  The flu binds to some of the receptors in the back of the mouth.  It would be hit and miss if they were to test for covid in a mouth swab since there would only be a few viruses around that area from the air you recently breathed in.

That is how I interpret it from what I read anyway.

The flu test only tests for a few strains of virus, it will not pick up other viruses because of the way it is designed.