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New data is accruing. it's hard to give advisers a fixed snapshot of what the efficacy is of the clinical trial of the data set. if they wait longer if they administer the third dose in that clinical trial. they'll have perhaps a better measure of a effectiveness from this trial. but also have a settle data set. a firm picture of what level of effectiveness the vaccine is delivering. >> the fda vaccine advisory committee delayed a meeting which was set for tuesday. meantime across the united states. a growing number of states moving to end mask mandates even though the guidance from the cdc ha...