@gardengirl778 @SJScherban @AbraarKaran A few million were sent as aid, yes.
China imported BILLIONs of masks, essentially draining commercial stock throughout the world, and then banning exports (as you say, China produces them).
Bottom line, there weren't many high quality masks available to the US in March.
@gardengirl778@SJScherban@AbraarKaran数百万人被派去援助，是的。
中国进口了数十亿口罩，基本上耗尽了全世界的商业库存，然后禁止出口（正如你所说，中国生产口罩）。
归根结底，三月份美国没有多少高质量的口罩。