@i_petersen @ZerocovidD @_TheAncientOne_ Have you? For example, ventilation. It is widely recognized that transmission outdoors is very low, arguably negligible. Clearly ventilation can have a large effect.
"Masks" (i.e. hodgepodge of mostly shitty community masks) are likely around 20%, not the entire cheese stack.
@i_petersen @ZerocovidD @_TheAncientOne_ 你有吗？例如，通风。人们普遍认为，户外传播非常低，可以说可以忽略不计。显然，通风可以产生很大的影响。
“面具”（即大多数糟糕的社区面具的大杂烩）可能在 20% 左右，而不是整个奶酪堆。