U.S. labor revival in doubt as Delta raises worries about 'back to school'

"That is absolutely a concern as we move into this coming school year that we have this more contagious variant, and this is a group of individuals who won't be eligible for vaccination yet," said Dr. Sean O'Leary, a pediatric infectious disease specialist at the University of Colorado, Anschutz Medical Campus and vice chair of the American Academy of Pediatrics’ Committee on Infectious Diseases.