While the filters, called N95 respirators, can catch a much wider range of airborne pathogens, they are more expensive and in much shorter supply than the masks-of great concern during a flu pandemic.

  • 尽管名为N95呼吸防护口罩的这种过滤口罩能够捕捉到更多的依靠空气传播的病原体,但它们的售价更高,而且与外科口罩相比供应量也大大不足——这在流感大爆发的情况下不免令人担。

  • 互联网摘选 2025-01-20 13:31:39

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