In early November, a co-worker and I came back from a business trip, from a location that later became a hot spot. We never had symptoms, but a co-worker became incredibly ill later in November, with flu-like symptoms, and it lasted over two weeks. We're in Taxifornia (northern, SF bay area) which now seems to have a bit of the 'herd immunity' that many have been talking about.
100% anecdotal, of course. But the more you hear about people in this area who became really sick, or if you were sick in that time frame, the more it makes you wonder.