Many of us are already retired, so our circles are a whole lot smaller than those who are still working. Perhaps a handful of former co-workers become people you send a card to, chat once or twice a year, email, and far far less than that this past 18 months.
For folks who are retired without a big network of non-work friends, it's mainly family that would count for "knowing someone" properly. So if you also have a relative small family and can count your close personal friends on one hand - hey even less chance to know someone.
I know "of" many people who got it, but these aren't people I'd consider as people with whom I have a personal connection, or that I'd report as Close To Home. Inside that group, I have only one person: My teenage nephew, last thanksgiving, with a barely symptomatic case that no one else in his family picked up from him. The next nearest person is DH's great aunt (whom I've never met), and a brother-in-law of a sister-in-law of my sister.
I'll go back under that rock now.