@connellryan1 @DrLeanaWen Also, there is evidence of empirical fit factor on N95s without training or fit testing. It is reasonable, no question better than cloth or surgical. I don't feel like looking for it but it's definitely out there.
@connellryan1@DrLeanaWen同样，有证据表明N95s的经验拟合系数没有经过培训或拟合测试。这是合理的，毫无疑问比布料或外科手术要好。我不想找它，但它肯定在那里。