and right now it tends to be ten days, and they hope to get them back, but here again, here's another logistical nightmare. there are so many children in school, and so many children to track in terms of when they're infected, how long they've been home, when they come back to school. it's a major logistic issue for districts. particularly the larger schools. the high school with thousands of students and middle schoolers. even a small elementary school will have hundreds of students. after that the staffing shortages, the school districts are facing right now where teachers are not showing up, cafeteria workers, bus drivers. there's a lot of personnel missing. in a lot of cases, the closing of school has more to do with the staffing shortage than necessarily the pandemic. >> so doctor, i'd like to bring you in. your medical advice. what's the best way to keep our kids safe in school? and i know that can be different based on their age, whether