Here in Switzerland they specifically do not want to close schools (yet) unless the school had a positive test and kids are in self quarantine. The reason give

Here in Switzerland they specifically do not want to close schools (yet) unless the school had a positive test and kids are in self quarantine. The reason given is that if the kids are home it is likely that the grand parents will have to care for them as the parents have to work and the elderly are the high risk group.