In the last few days of January and two weeks in early February in Manhattan, I (26M) got quite sick. The first few days were pretty bad and I had 102F fever. I had lots of difficulty breathing and a dry cough for around 2 weeks after. A friend/co-worker who sits next to me at work had essentially identical symptoms 12 hours before me lasting for similar amount of time. I think his breathing problems were less bad than mine.

The worst hit me on the weekend and I returned to work on Monday with the cough.

Around 1 week prior I attended a company holiday party at a large museum with (probably?) one thousand attendees from all over the world. They mostly came from the EU, but at least some from APAC as well.

I have no evidence that this was COVID-19, but in retrospect the symptoms matched reasonably well and I haven't been sick since.