Rumours were swirling all week that Boris was deteriorating.
You can be 100% sure that they did EVERYTHING they possibly could to avoid a sitting premier being admitted to hospital over this.
The word is that he was finally admitted because his respiratory problems became too severe to treat with a team of doctors alone, but there was no way to quietly bring a ventilator, plus the necessary trained staff, into No. 10 without it leaking. So, they had no choice but to bite the bullet and have him admitted.
He has to be in an ICU and, almost certainly, is already on a ventilator.
That is bad. Very bad.
By the time the disease develops to the point of needing a ventilator, in the best of circumstances your chance of survival is 50%. In some countries, however, it can be as low as 20%. By this time next week we will know if he has survived.
Bojo's chances are probably better than most as he is only 55 years old, but almost all survivors sustain permanent damage as a side-effect of intubation. Often damage to their cognitive function.
My bet is that he will survive but will have no choice but to resign. That is a tragedy for his family and his pregnant fiancé.