YMMV. I’ve had Covid multiple times, including Covid OG (the worst) in March 2020 and most recently 2 weeks ago (lots of cranial and sinus pressure).

I also had it last summer on vacation and it barely impacted me, like only 24-36 hours, a mild fever and a slight cough. I made ribs and drank some whiskey as a cure. My wife caught it from me and was down for 4-5 days. I didn’t even know I had it until she took a test and it came back positive, so I took one too which also came back positive. A day or two after my bout I went for a 4 hour, mid afternoon 50 mile round trip bike ride from Jackson Hole WY to Jenny Lake in GTNP (elevation ~6,200 to ~6,800) on a 90+ degree day. The strenuous activity, lack of proper nutrition before and during my ride, and subsequent sunburn honestly left me worse than the Covid I had just days prior.