I had a really nasty in December of 2019. Basically, the inside of my head felt like I was undergoing an extended session of CS gas training. My sinuses gushed for 2-3 solid days. I slept face down with my forehead on a chair by the bed, dripping onto a towel I threw away. Back at work (because work...) the next day, I passed it on, and it damn near kilt a cow orker. I think it was here. Lots of similar reports out there. JR got an antibody test in early 2020, when they became available, and tested positive, and he was sick about the same time.