@wsbgnl @JamesConran1 @BillHanage Also more availability, variety, and lower costs for those higher quality masks (including some free N95 masks, though availability is extremely uneven).
@wsbgnl @JamesConran1 @BillHanage 对于那些更高质量的口罩（包括一些免费的 N95 口罩，尽管可用性极不均衡），它们的可用性、种类和成本也更高。