“What happens in schools is going to be reflective of the broader community no matter how good a job we do in implementing the mitigation measures,” said Dr. Sean O’Leary, professor and pediatric infectious disease specialist at the University of Colorado’s School of Medicine in Aurora. “If we see that in mid-August we are seeing similar levels of disease to what we’re seeing in Texas and Arizona, I don’t know that it’s safe to open schools at that point because there’s so much virus circulating.”