@BallouxFrancois There is definitely regional variation. Within the past few months I've traveled between places where literally everyone (ex ~1%) wears a mask (w/o mandate) indoors and no one does.
Online completely erases distance in a way personal experience (even with air travel) does not.
@巴卢克斯·弗朗索瓦（BallouxFrancois）绝对存在区域差异。在过去的几个月里，我走遍了很多地方，每个人（前1%）都戴着面具（没有强制要求），但没有人戴。
在线完全消除了距离，而个人体验（即使是航空旅行）却无法做到这一点。