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Said the united states has made in the battle against the coronavirus. he used the opportunity to urge eligible americans to go get the pfizer booster shots after the cdc gave the green light overnight. joining me for more on this, because theres lot to this, cnn chiefd dr. sanjay gupta. the guidance from the cdc comes down to who should and who may get the additional dose. can you lay it out for us? >> this is specific language when you look at the cdc recommendations, officially recommended by...