Boosters and mixes: Health officials consider most beneficial combinations

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UP NEXT
Trump indictment would only be a problem if he and GOP make it one (and they're trying)
07:04
U.S. takes politician indictments in stride; Trump case should be no different: Maddow
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Trump's life-long record would make an indictment unsurprising
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Democratic activist delivers straight talk to his party on long term strategy
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As Florida county bans Holocaust book, actual neo-Nazis grow bold in U.S.
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Senator Warren on how to fix what Trump broke in banking rules
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