Trump's condition is worse off than what his doctor said in press conf. IMO, he wouldn't give out specific details, he seemed to be "pussy footing" around the direct questions asked.
He dodged if he was ever on oxygen, said this was 72 hours into the diagnosis (meaning a positive test Wed) and someone said he was given the antibiotic cocktail 48 hours ago, which puts it at Thursday morning before he admitted he had even taken a test and claimed he was still waiting on results.
It is looking more and more they knew soon after the Rose Garden event that he had been exposed. They may have even held off testing after that, but they may have known by Monday. It is possible they didn't test until Tuesday and showed up late at the debate to not be tested because that way they could say semi-honestly that he hadn't tested positive. Once symptoms started, he was forced to take the test.
The only thing we know for sure right now is they lied about it, we don't know the actual truth.
(We should assume they are still lying about it.)