I'm kind of glad to hear other people reporting similar events. I too had a really weird cold in Jan/Feb that left me coughing and very short of breath after simple activities like running up the stairs. Before the lockdown, I was a 5-day-a-week gym-goer, so this was very unusual.

It wasn't until the shutdown occurred that I read about the symptoms and noted that shortness of breath was a tell-tale symptom. I also worked at a place with offices in Shanghai and many Chinese nationals working locally.