Everyone has had it.
TWICE.

We're probably not too far off from this becoming true.

I know I had SOMETHING back in Spring 2020, because I had a persistent cough that lingered for 3-4 months, and I absolutely NEVER get a cough. At the time, the persistent lingering cough was one of the hallmarks of the initial strains of COVID.
And then I tested positive for it in June 2022, very mild symptoms, just felt like allergies.
So, yeah, I'll go ahead and say I've had it twice.

The flu I got in the first week of November, on the other hand, was pretty rough. Sore, achy body, headaches, fever, chills, that all lasted several days. I've always said I didn't think I'd ever had the flu, and now I know I was right (pre-Nov) because I've definitely never felt anything like that.