I had chicken pox and then celebrated my 40th birthday with shingles. Luckily I had a very mild case of shingles.
Not sure if I've ever had the "flu" flu. I've had stomach flu a bunch of times, or maybe it was food poisoning, where I was knocked out vomiting and utterly miserable for ~24 hours, but that's not the same as influenza.
At this point I'm relatively sure I haven't had the 'rona, even asymptomatic. Between the kids, my wife (who has to go to the office every day and interact with 2 doctors and an MA), her parents, the kids' mom and her extended family, etc, if one of us had had it there would have been at least SOMEONE who caught it with symptoms.