For many years I think Bob, the world at large has been far too relaxed about going out in public, let alone turning up at an airfield or getting into a shared car with infectious diseases. A cold can put a professional pilot off work for several weeks, flu a month. I really hope that one beneficial effect of Covid-19 in our culture is a complete end to that being regarded as acceptable behaviour.
I used to run a large team managing a research aircraft, most of us flying on it regularly. I would send absolutely anybody home who had cold symptoms and wrote into the staff handbook that people were *expected* to work from home if they had any signs of a cold - and yet people used to routinely come in sniffling. If I was still there, by now I think it would have become a disciplinary offence.
G