first of all, he probably caught covid again while in the hospital....I would be vast majority of us have had it or have it....its like pollen falling from a tree....we will all get a little bit....but that does not mean its enough to make you sick nor infectious.
2ndly, I wish they would autopsy someone younger.....86 yro is not a good standard to make judgements on....IMO...if it were a healthy younger man, then people would sit up and take notice.