The report said, that she died of hantavirus disease.
That can kill anybody, regardless of age.
Looks like she got sick, thought that it was flu, did not consult doctor, and eventually died, trying to take Tylenol, as she felt very sick!
Gene then died of Alzheimer. He just could not take care about himself, obviously.
Very sad story, but all natural. And not that unusual, recently.
They lived too much a secluded life.
Conclusion: make sure somebody checks on you, sometimes!
I knew somebody, who died home, in sofa, watching TV.
They found him weeks later, still sitting in sofa, with TV still on!
Loner. The neighbors finally realized something is wrong.