cloth masks provide the least protection with omicron so contagious, and that n-95 and kn-95 masks provide more protection and they're especially important for people at high risk of infection or severe disease. tonight, as this moves across the country, in new york, the encouraging news -- a glimmer of hope on all of this. once the epicenter of this omicron wave at the start, what the governor now says they're seeing. here's erielle reshef tonight. >> reporter: tonight, the cdc is out with that long-awaited guidance on masks, warning that loosely woven cloth masks provide the least protection, that n-95 and kn-95 masks might be a better option, and that these highly protective masks may be important for people in high-risk settings or at risk for severe disease. but the cdc stopping short of urging americans to upgrade their masks, even though health experts have been recommending higher quality masks in the wake of omicron. >> the cdc is recognizing that n-95 and kn-95 masks really