It works both ways - I went for a run on Sunday, scrupulously swerving into the road if someone was coming the other way on the pavement, running on the grass once I was in the park to keep a safe distance from people walking. Occasionally I'd be on a narrow section and would be amazed to see two or three people ambling towards me taking up the whole path, making no effort to move across. I'd have to stop dead and practically fling myself into a bush to let them stroll past. That said, there were lots of sensible people too and most people seemed to be keeping an eye out for each other. So it's wrong (and unhelpful) to blanket-blame whole groups of people.
Also, before we all lose our minds, do remember it's actually a very small risk if someone is whizzing past you at speed - see here: [www.theguardian.com
Though obviously, we should all keep a safe distance at this time for peace of mind and common civility.