What are the error modes of waiting too long to read a rapid antigen test? Does this increase the probability of the user reading a false positive, false negative, or both? How does this depend on time?
I currently am interested in results from a BinaxNOW kit, but I've used several brands and they all work more or less the same way, so I suspect that this generalizes.
What is the relationship between test failure modes and time after the recommended reading interval?