@RidleyDM @AdithyaR_YXE @NjbBari3 Unfortunately in early 2021 the messaging (at least from CDC and others echoing it) was still very confused, and didn't improve quite for some time.
And arguably that may have been precisely the time when better masks would have been most useful.
https://www.washingtonpost.com...
@RidleyDM @AdithyaR_YXE @NjbBari3 不幸的是，在 2021 年初，消息传递（至少来自 CDC 和其他回应它的人）仍然非常混乱，并且有一段时间没有改善。
可以说，这可能正是更好的口罩最有用的时候。
https://www.washingtonpost.com...