swells up in you when you know you re helping your community. it s a beautiful feeling, honestly. reporter: at this hospital, national guard members are scheduled to work only for about two weeks. that two weeks can be extended if there is a need. it seems fairly clear there will be a need. bianna. our hats off to them for extending their help. joining me, dr. megan ran any, associate dean of public health at brown university and dr. michael min nah from e med, a health care company that provides at-home covid testing. let s begin with chicago public schools canceling classes today after teachers voted to go virtual. more districts across the country are going remote or at least delaying the return to class due to these on going surges. earlier this morning, dr. leana wen said if they re wearing a high quality mask and if they re vaccinated and boosted, the