Allowing a single covid-positive kid go to school means contaminating a significant portion of the class's students and students' parents. Ten days out of school sounds fine. Long covid is a thing; being unlikely to die does not mean that illness is unlikely to be life-altering.
> Allowing a single covid-positive kid go to school means contaminating a significant portion of the class's students and students' parents
To a first-order approximation based on data from my three kids and their classes/schools, pretty much all the children in all the kindergarten and school classes got Covid last year. All their teachers got it, too, including the vaccinated ones.
Early last year I recall talking to my (then) 8 year-old about his best friend, who was stuck at home for a fortnight after testing positive Covid [this was before we'd all had it]:
me: "How is he?"
son: "What do you mean?"
me: "Is he OK?"
son: "Why wouldn't he be?"
me: "Is he getting better?"
son: "He's not poorly, he's just positive, Daddy!"