out they will be reassessing what their protocols will be. they say they will do right by our children and went on to say that by the end of the week they expect to have updated policies to address things like mask wearing, testing, et cetera, how they will move forward given the rapid spread of omicron. >> a lot of parts are in limbo wondering what they should do once school gets under way. leyla santiago, thank you. joining me is dr. michael mina, the chief science officer at e-med, a health care company that provides at-home testing. he's a former professor of epidemiology at harvard university. great to have you on. i want to start with the cdc and its defense over its new guidelines that reduce the days that covid patients need to remain in isolation if they're asymptomatic. there have been a lot of questions as to why the guidance does not include testing as a