Have you taken an antibody test? You may find out that you’ve actually been infected but had no idea other than a few coughs or sneezes. That’s what happened to me. I have no idea who or where I got it from. I’m presuming it was the Omicron version since it was barely noticed. (I have allergies year round to one thing or another, so that’s my norm.)
No, but I’ve been well secluded so the odds are pretty low I’ve been exposed.
And the last time I was sick was Feb 2020.