@BestinthePNW_ @drlucymcbride @kprather88 That's not evident at all. There is a continuum of effectiveness and a minimum standard that is more than nothing and less than an N95 is perfectly plausible.
@BestinthePNW_ @drlucymcbride @kprather88 这一点都不明显。有一个连续性的有效性和一个大于没有和小于 N95 的最低标准是完全合理的。