You're right. My issue is that why did US health officials say masks were not effective against respiratory infections, when health officials from Asian countries had deemed them effective.
Why didn't we have the science? Respiratory infections aren't new. I remember debating people early in the outbreak about the use of masks and they were pointing out that there was little scientific evidence on the use of masks, especially non n-95.
Why didn't we have the science? Respiratory infections aren't new. I remember debating people early in the outbreak about the use of masks and they were pointing out that there was little scientific evidence on the use of masks, especially non n-95.