Considering that his doctors just said that he might be released from the hospital in the next day or two, I can see why some people still seem to think that Trump was faking. But, I doubt he could get that many doctors to go alone with him, so it's pretty silly at this point to continue to believe that Trump's Covid is a hoax.
The thing I'm afraid of is that considering how well he seems to be responding to treatment, his cult will continue to think this virus isn't serious. But, what they don't seem to realize is that the rest of us won't have access to the type of care that a president receives. Most of won't have a huge private suite in a highly regarded hospital and the rest of us won't have about 10 doctors all worrying about our outcome, nor will have access to some of the most expensive, still experimental treatments that have worked well in many cases, despite not being formally approved by the FDA.
Of course, it's very possible that Trump will regress after improving for a couple of day, as this is an extremely weird, not fully understood disease.