I have a good friend that recently died of the Covid.
He was robust 72 year old. Strong, active and had good energy. No chronic problems.
He pretty much adhered to the guidelines because he knew he was at risk because of his age. He wore a mask and really limited his trips outside the home. He was doing all the right things.
He was waiting to get the vaccine appointment but it hadn't been arranged yet.
He had severe flu symptoms. Got so bad he went to the emergency room. Was tested and had Covid. The pneumonia was pretty bad and it started to affect his other organs. He was on a ventilator for two weeks and finally everything gave out.
I went ahead and got the vaccine because of my age. However, if I was younger I wouldn't.
My 36 year old son had the Covid and only had mild symtoms for a couple of days. His wife got it at the same time and it was a little worse but nothing serious. My six year old granddaughter living with them never showed any signs of being sick.
sorry for your loss