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Kids staying at home with grandparents means far smaller groups of people though.

When my daughter started preschool... boy did she ever bring home every type of disease known to science. We ended up pulling her out and just having her grandparents look after her, which worked out really well, because I kept getting sick and missing work myself.

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>Kids staying at home with grandparents means far smaller groups of people though.

No, it means smaller groups of kids, but not for those seniors. They still go about their day, visiting with friends etc.

They can choose to not do that. Kids can't just take care of themselves on their own, they need an adult to take care of them. And seniors are a lot better about washing their hands and other things than young kids in big groups are.

But those preschools build immunity.

Being "immune" just means your body can fight the infection effectively. It doesn't mean you don't get infected and can't spread the disease for a short amount of time.

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