F.D.A Delays Review of Pfizer’s Covid Vaccine for Children Under 5 February 12, 2022 Auto Bot BioNTech SE, Children and Childhood, Clinical Trials, Coronavirus (2019-nCoV), Coronavirus Omicron Variant, Food and Drug Administration, Pfizer Inc, Vaccination and Immunization 0 The agency will wait for data on whether three doses of Pfizer-BioNTech’s Covid vaccine are effective in young children after new, disappointing data.