Hear the latest on who should receive the fourth dose of the COVID-19 booster—and when—and whether we’ll be seeing a vaccine for younger children soon. Susan R. Bailey, MD, immediate past president, AMA welcomes Peter Marks, MD, PhD, Director of the Center for Biologics Evaluation and Research at the Food and Drug Administration (FDA), addressing a host of hot topics related to the fourth dose booster vaccine and provide updates on pediatric vaccine safety data.