Contact tracing is largely gone. I think and i believe that we should be treating every case as if its a variant during this pandemic right now. The good news according to dr. Anthony fauci is Johnson Johnsons new singledose vaccine could help get more people vaccinated and prevent severe disease and hospitalizations as the virus continues to mutate and replicate. We have now a valueadded additional vaccine candidate. This is a singleshot vaccine in which you start to see efficacy anywhere from 7 to 10 days. It is inexpensive and the company is capable of making doses in the numbers of billions. Joining me now nbc news chief White House Correspondent and Weekend Today cohost Kristen Welker. Dr. Celine gounder, a member of bidens Advisory Board during the transition. And patrice harris, former president of the american medical association. Kristen, how difficult is it proving for the biden team with such a short transition, if any, to get their arms around the shortage of doses and the