AVOID INHALING SUSPICIOUS AIR….
I do follow this tactics for over a year, and find it quite good. Why not to try it?
It’s good indoors as well as outdoors. Of course whenever you find yourself surrounded
by several people, you quietly distence yourself.
Not just for 2m = 6ft, but as far as possible. 5m=15 ft is reasonable maximum, unless
outdoor in windy days. At that situation you think it out yourself.