CNN CNN Newsroom With Fredricka Whitfield January 22, 2022 16:36:00
N n95, if youre older, immuno suppressed, if youre in a crowded area where people arent masked and tests a good tool for certain things. use it right at the right time, in the right way and it can do a lot of good. >> here with us now, cnn medical analyst, dr. leana wen, author of "lifelines, a doctors journey in the fight for public health", congratulations on your book and good to see you. >> great to see you. >> we heard from dr. frieden there, do you share that same kind of optimism? >> i do...
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