“If theres any wind to speak of, being outside, in open air, with others (who are not visibly sick) is PERFECTLY SAFE. Eventually the experts will figure that out.”
I guess that I need to qualify a bit, by saying that the groups do have to be relatively small, maybe up to half a dozen or so.
Only exercise in UK will be in the vicinity of a wind power generator......but be careful to avoid falling chopped up birds or bats.