[SideburnsOfDoom]

> Boris Johnson nearly died of COVID ... He understood the risks.

The second does not follow from the first. Some people don't understand risks ever. Learning is optional.

What, if anything did Mr Johnson learn from having COVID in office? What did Mr Trump?

I suspect a) nothing and b) less than nothing.

I could be wrong, but the opposite, that "he must have learned" does not follow.