Can someone explain how Boris is now in ICU but the Prince recovered so fast even though he is much older
The bad news is that we don't know what all of the predictors are for severe cases. It could be something that we're completely overlooking at the moment.
The good news is that considering the very short time it's been studied we know quite a bit about the virus and there is so much research being done that our level of understanding is growing quite rapidly.
So sorry about Boris, best wishes for a speedy recovery.