The Food and Drug Administration has requested Pfizer and Moderna to test their COVID vaccines in more children before seeking authorization to help rule out safety issues. The expanded pediatric trials will determine whether the rare heart conditions shortly after vaccination are more common in younger age groups. Dr. Amesh Adalja, infectious disease specialist and senior scholar at Johns Hopkins Center for Health Security, joined Cheddar's Opening Bell to discuss the necessity of having a bigger sample for children's COVID-19 vaccines.