"world news tonight" is coming up next and i will see you at 4:00. ♪ tonight, several developing stories as we come on the air. our exclusive tonight inside the cdc. what they're seeing with this new variant in the u.s. right now. and tonight, pfizer now revealing new data on its booster, up against the omicron varia variant. saying the booster does appear to reduce protection. this new data allows him to breathe a little better. tonight, our dr. jen ashton inside the cdc. what they're seeing across the nation and what has the cdc director most concerned? also, dr. jha here tonight answering your questions. if the boosters are, in fact, this effective against this new variant, what about children and the current timeline? also tonight, the trial of former police officer kim potter now under way. officer potter charged with

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