He's at his Chequers Country Club biding his time and being briefed by his fellow rats what the right time will be to come back to exploit any encouraging news that the worst is passed for now.
I'm not one to naively think politicians won't take advantage where they can, but I can assure you anyone who has been seriously ill with Coronavirus, and that doesn't mean just those who have had to be on ventilators, will need plenty of recuperation time, especially one so obviously fat, out of condition and therefore susceptible to slow recovery as him.
Doctors don't take precautions just on a whim.
The responses in this thread are all too predictable and mostly nonsense - just letting their natural bias rule over any common sense.
(And I don't think he's anything like really weak now but it's still medically sound to not rush back, with politicians they no doubt would for the right moment but they still shouldn't)
This virus shouldn't be treated as if it's nothing, it effects very overweight people disproportionally, they really are susceptible