Apparently they have unretired: https://www.sportskeeda.com/mma/5-ufc-fighters-suffered-badl...

However, as you can see, young and fit is no protection.

It's a roll of the dice.

> It's a roll of the dice.

So is getting the vaccine. It is a risk-reward calculation with many unknowns.

The following must be kept in mind: For the younger population, there a strong incentive to exaggerate the risk of the virus and to downplay the risk of the vaccine, in order to maximize vaccinations and (hopefully) minimize overall mortality. I must assume that public health authorities act in the collective interest, not mine.

Personally, I am unwilling to sacrifice myself for the "greater good", even if it's a really small risk. My individual risk of contracting COVID must exceed the individual risk of taking the vaccine. As long as that remains in question, I will remain hesitant.