@connellryan1 @DrLeanaWen "Can not be worn by everyone safely is irrelevant" as there have always been medical exemptions.
"Effective for everyone" isn't relevant in a universal masking mandate scenario. The goal is to achieve higher average protection of everyone present.
KN95s or KF94s as easy to use.
@connellryan1@DrLeanaWen“不可能每个人都安全地穿着是不相关的”，因为一直以来都有医疗豁免。
“对每个人都有效”在一个普遍的任务场景中是不相关的。目标是为在场的每个人提供更高的平均保护。
KN95s或KF94s同样易于使用。