I'm thankful generally I've avoided major health complications. My wife has had three hip replacements and shoulder rotator cuff repair, which was far worse.
A positive attitude is healthier, I think, if one can manage it. My wife donates to St. Jude's, which I hope is legit, they advertise too much for my tastes, but children getting cancer would be about the worst. Children getting sick is bad enough. My kids were remarkably healthy, and have been since growing up, some athletic injuries.
My daughter was visiting last week and said he knees seemed to be fine. She's starting to have gray hair.
My shoulder was a 50 year old injury, the doc said he could tell, it was kind of a mess in there.