As the Omicron variant spreads across the U.S., CDC Director Dr. Rochelle Walensky joins MSNBC's Ari Melber to discuss what experts know about the new variant, why the Delta variant is still the main coronavirus risk in the U.S. and the CDC's shifting mask guidance.
from MSNBC Top Stories https://ift.tt/3xWdOkD
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from MSNBC Top Stories https://ift.tt/3xWdOkD
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