facing sharp criticism from the white house and the experts within the cdc itself. cnn s gabe cohen explains. and we were to go and work on updating reporter: cdc director dr. rochelle walensky facing renewed criticism from within the white house and her own agency after yet another guidance gaffe. sources telling cnn that cdc are frustrated with walensky s guidance, and between her circumventing guide ince and public criticism, morale at the agency is sinking. it really had a lot to do with what we thought people would be able to tolerate. reporter: it comes after the cdc cut the covid isolation period from ten days to five making no mention of a negative test. drawing pushback from health experts and contradiction from the surgeon general. they have certainly received feedback in question about the