To some degree yes, but these particular rehydrated antibody tests leave very little room for genuine false positives. If something binds on the test part of t

To some degree yes, but these particular rehydrated antibody tests leave very little room for genuine false positives. If something binds on the test part of the strip it has the right epitope and there are no other viruses yet with these patterns. The integration of the signal across the width of the strip increases the signal to noise by a lot. I could detect decaying curves post infection at 50 times lower viral load than naked eye and confirmed by PCR. As the infection progressed, at some point the signal merges with the noise while PCR can still detect it, but the window is much smaller than with naked eye.