Get a Pfizer Booster After 5 Months, Not 6, the C.D.C. Says January 4, 2022 Auto Bot BioNTech SE, Centers for Disease Control and Prevention, Coronavirus (2019-nCoV), Pfizer Inc, Vaccination and Immunization, Walensky, Rochelle 0 Following the F.D.A.’s lead, the agency also recommended third shots after four weeks for some immunocompromised children 5 to 11.