After a day in a strange void, an official statement emerged from Downing Street just after 8:00 p.m. BST.
Having struggled to get rid of the symptoms and having been hospitalized 24 hours before, No. 10 announced that the Prime Minister had been transferred to intensive care.
Downing Street has made it clear that Boris Johnson is still conscious, and it is understood that he has not yet received ventilation to help him breathe.
But the decision was made to move him to a part of St Thomas’s hospital, where this type of treatment would be immediately available if needed.
It has been clear for several days that Mr. Johnson is taking much longer to recover than expected.
He has regularly appeared on social media to say that he suffers from mild symptoms and that he follows advice in the usual tone.
Even this morning, No. 10 insisted that he was still receiving red boxes full of government affairs and was in contact with his team.
But obviously, his condition deteriorating on Monday afternoon, the view of his condition changed.
The prognosis being uncertain, the government made a very unusual decision by asking the Minister of Foreign Affairs Dominic Raab to run for the Prime Minister if necessary.
Speaking on Monday evening, he said government business would continue as ministers focused on implementing the coronavirus plans that Mr. Johnson had asked them to do.
But the foreign secretary seemed understandable, but obviously shocked.
Politicians have repeatedly stated that the coronavirus does not discriminate, that the infection does not choose.
With Boris Johnson now in intensive care, it is clear that power is not protection against damage.