He isn't at a private hospital. Most of them are now only taking nhs cases anyway in London at least. They have suspended their private work.
It's been upsetting to see mnetters struggle with severe illness and likely pneumonia for weeks at home, unable to be access hospital care. I imagine that as pp siad, the threshold for the prime minister to be admitted is much lower. But who knows what is really going on.
I hope he will be ok. Separately really hoping Raab has limited time at the helm, he is not good.