Just circumstantial. I was knocked down with something I self-diagnosed as "walking pneumonia", which turned out to be the thing a lot of these cases were diagnosed as before the virus was widely known. Several days after a flight. Main symptom was lots of coughing and some fever. Felt better after 7-10 days, but coughed frequently for several more weeks. Not really the aches of flu, nor any nasal/sinus symptoms--just totally wiped out.

Until we have antibody tests, no way to know. And I'm locked down hard--not assuming anything.