CNN At This Hour With Kate Bolduan December 28, 2021 16:34:00
Talking about 2.5 micrometer particles that are being filtered out. so the n-95 filters out more and smaller particles. but if you're in an area y where you don't need that protection, the cloth masks with the filter work well. >> does one need to get retested after testing positive and isolating for ten days? by the way, you know the cdc guidelines have been dropped down to five days if you're asymptomatic. she says, if yes, how long after the end of the isolation period? does there need to be retesting after testing positive? >> i get asked. this so much. the answer is no. the official guida...