Both myself and my DH have had Covid, we are both in our 50s, we are both slightly overweight and DH has AF. We both say it was nothing like flu, I was ten times worse when I had flu. I am well aware that this is not the case for everyone but the majority of people do recover well. It is, of course, tragic for those who don’t but death or serious effects are not inevitable regardless of age
Ive also had it and I'm in my 60's. It was like flu and lasted 3 weeks. I caught it on a holiday in either Italy and Switzerland at the beginning of February and Ive had no long term side effects.