'We Have The Tools To Handle This': Health Officials Brace For Omicron Variant

Dr. David Kessler, chief science officer for the Biden administration's Covid-19 response, answers questions and concerns from Rachel Maddow about the current state of vaccines and treatments for Covid and how the Omicron variant changes the picture.  » Subscribe to MSNBC: http://on.msnbc.com/SubscribeTomsnbc

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