measures that i announced yesterday are, we believe, are sufficient to deal with the proper medical precautions to deal with the spread of this new variant. i m not a scientist, so i continue to rely on the scientists and asking them wlrnts we have to move beyond what we did yesterday. right now they re saying no. cnn s chief medical constituent dr. sanjay gupta is here and going to discuss all of this and more with cdc director dr. rochelle walensky. sanjay, take away. doctor, welcome. and thanks for joining urs. thank you. good to be with you. good to be back with you. let s get to it. it is been over a week since the world learned about the new variant. what do we know now that we didn t know then? you know what, the data are starting to em ernl. we ve seen a rise in cases in south africa and southern africa