still the world in 2021 is different than it was in march 2020. officials say they are better prepared for the surge, they point to vaccines and boosters as the best way to control the virus and prevent serious illness. all true. and yet this fourth wave is exposing real weaknesses in how the u.s. has dealt with the virus especially when it comes to testing. on tuesday, we're told president bide listen give a speech on the omicron variant, not where he thought we would be a year ago when biden predicted christmas 2021 might feel close to normal. >> i believe we'll be awfully close to that if not there. it's not going to be quick, but i think by next christmas close to normal. >> joining me the chief medical adviser to president biden, dr. anthony fauci. dr. fauci, thanks for joining us. if you could go back in time to president-elect biden in that clip, would you tell him that we need a bigger multinational effort to vaccinate the world so as to stop mutations?