F.D.A. to Allow ‘Mix and Match’ Approach for Covid Booster Shots October 18, 2021 Auto Bot Centers for Disease Control and Prevention, Coronavirus (2019-nCoV), Food and Drug Administration, Johnson & Johnson, Moderna Inc, National Institutes of Health, Pfizer Inc, Regulation and Deregulation of Industry, United States Politics and Government, Vaccination and Immunization 0 The agency may act this week, when it is expected to authorize booster shots for recipients of the Moderna and Johnson & Johnson vaccines.