Has the opportunity to mutated that's when you see the stronger various like delta that are harder to control. alicia: you do know that their parents out there of a genuine concern about the mental health of their children, they are about kids wearing masks all day in school they really do not want them to. when you say to those parents because is a real worries as well pretty. >> yes and listen to those concerns and i understand the frustration but i believe our number one top priority is getting our kids in the classroom and of course keeping them there and we can do that safely. all we need...