Tour de France Stage 10 - Morzine to Megève (148.1km)

This is correct but if its that low it might also be just the beginning of the infection. Not to get to deep into a Covid discussion but if this is the game they want to play then they should be doing multiple daily antigen tests where you are detecting proteins that are there during the spreading stage of an infection. Admittedly it would be easier to "dodge" an antigen test if its self administered. How long its detectable via PCR is debatable and most labs will have a cycle cut off, so anything after that is simply a "not detected". We've done some cool things in our lab with testing sensitivity on both test types and several brands of antigen tests.