@Brad It seems that several things got conflated in this nutty "hygiene hypothesis" - Viruses vs. Bacteria most obviously.
There are lots and lots of good bacteria - you're literally stuffed with them. There aren't any good viruses.
All the studies I've ever seen on healthy exposures in children are on BACTERIA. (e.g. the evidence in favor of mothers being exposed to farmyards while the child is in utero & under 2 - greatly reduces adult incidences of immune dysfunction)
But they pivoted pretty damn hard once they faced a virus that they couldn't eradicate without costing the managerial class too much.
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