@AnneofKingston @snarkypeds @Sue_Innovates @DrLeanaWen These are averages (can be more or less in practice) based on a particular set of assumptions and also refer to the original virus. More transmissible variants are likely to transmit faster.
Also, guidance on even cloth masks always said to fit snugly. Not everyone does ofc.
@AnneofKingston@snarkypeds@Sue_Innovates@DrLeanaWen这些是基于一组特定假设的平均值（在实践中可能或多或少），也指原始病毒。更多可传播的变种可能传播得更快。
此外，即使是布面口罩的指导也总是说要贴身。并不是每个人都这么做。