“Many school systems may have to close down, and less to protect the children, who would only get a mild to severe “cold”, than to protect their older relatives.”
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Mild or severe, they’re still gonna have to give up at least two weeks of their life for it, if they get it. They’ll be able to spread the virus for at least 2 weeks, feeling sick or not - so quarantine it is.
Schools have closed down before because of the flu...many, many times. Hardly a new concept.