evidence: 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. Many child care directors, like Berg, are still following 10- or 14-day quarantines, closing entire classrooms after a single positive test, which has caused nonstop disruptions given the current record numbers of COVID-19 cases. Recently, Berg's infant room had "double-decker" quarantines: closed for two weeks, back for one day, then closed for another two weeks. [...] But child care centers, full of unvaccinated children, aren't sure exactly how to apply the new rules. That leads to tension between parents and providers.