lack of disruption the families have. test to stay allows us to say the child is asymptomatic. we can test and bring them back to school. >> the main goal is to keep kids in school if they test negative. one other thing, superintendents in illinois and kentucky said their programs are successful because they're part of a layerlayer ed mitigation approach and they also require masks as a mitigation measure. in marietta over the weekend the school district changed its mask policy to be optional. we'll see how that impacts the test to stay program. this is something the cdc is evaluating, and we can expect to maybe, possibly hear more from the agency in the future. >> interesting. jacqueline, appreciate it. thank you. joining us is dr. monica gandhi, professor of medicine, associate division chief of hiv infectious disease and global medicine at