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Fauci says U.S. should prepare to do anything and everything to fight the omicron variant
By Jessica Bursztynsky
Vaccine inequity and hesitancy made the Omicron variant more likely, scientists say
By Ivana Kottasová
Still 'not clear' whether Omicron COVID variant is more transmissible or more severe than Delta: WHO
Moderna says an omicron variant vaccine could be ready in early 2022
By Jessica Bursztynsky