The people who take care of and educate children under 5 years old — both parents and providers — are in a special kind of hell right now. These children are too young to be vaccinated, and it's difficult for them to wear masks consistently. … Parents, meanwhile, are losing their tempers, losing sleep and losing jobs when the child care they pay for is canceled, over and over. About 1 in 6 parents told pollsters they had experienced either a school or a day care shutdown in the past few weeks…