which is overwhelming the system that we're seeing. >> the other big news, the cdc's updated his mask guidance to reflect the need for more protection from omicron. i think a lot of our viewers have heard all of her doctors speaking for months about need for better masks. why do they wait till now? >> they are behind on this. one i think a lot of people -- many experts have talked about the importance within indoor crowded places. there's so much greater protection that n95s can present, because they're just better blockage. the reason i think there is hesitation is, will people use these masks in a way that would offer them the greatest amount of protection? it's interesting even if they released this information -- some protection, but the highest rate of protection is n95 or kn95.