'Hygiene Hypothesis' or 'Old Friends' Theory?
Is it the "hygiene hypothesis" or the "old friends" theory that makes the most sense? From a recent report on papers from the International Scientific Forum on Home Hygiene, it seems like it's just two views from different sides of the same coin.
hygiene hypothesis old friends theory hygiene hypothesis old friend theory make sense recent report paper international scientific forum home hygiene like view different side coin