“The concern now is that we’ve had this global dip in vaccination coverage as a result of the pandemic, probably not actually from vaccine hesitancy or refusal but just there were a lot of kids that missed their checkups during the pandemic, and we really haven’t completely caught those kids up,” said Dr. Sean O’Leary, chair of the American Academy of Pediatrics’ Committee on Infectious Diseases and professor of pediatric infectious disease at the University of Colorado School of Medicine and Children’s Hospital Colorado.