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AstraZeneca vaccine booster works against Omicron
France cancels order for Merck’s COVID-19 antiviral drug
US authorizes Pfizer oral COVID-19 treatment, first for at-home use
COVID-19 claims two lives, infects 359 more in last 24 hours
Too soon to say if Omicron more transmissible than Delta: WHO
AstraZeneca, Oxford aim to produce Omicron-targeted vaccine
Biden lays out plan to fight surging Omicron