I was being conservative
I still stand by my assertion that is much, much sicker than the doctors are letting on. And for that reason he's getting not one, not two, but three aggressive and/or experimental therapies that are indicated for the most severe cases.
I have no idea how long it may take that aggressive combination of therapies to make a difference. I suspect very few, if any, 74 year old obese males with a positive COVID diagnosis have taken that exact same combination of drugs, so we can't know how effective it may or may not be, or how soon to expect to see a change.
Obviously the doctors think it is the best course of treatment. It may well be effective.
I have a hunch, a prediction, it's not enough to overcome his illness. His comorbidities are too intense. He may well be incapacitated and hospitalized for much longer than a week, but I'm not ready to assert that yet.