Link from hygiene to allergies gains support.
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Erika
E
D000485:Allergens / Q000276:immunology*; D000818:Animals; D000829:Animals, Domestic / Q000276:immunology*; D002415:Cats; D002648:Child; D004285:Dogs; D006801:Humans; D006920:Hygiene; D006967:Hypersensitivity / Q000276:immunology* / Q000517:prevention & control*; D018448:Models, Immunological; D013045:Species Specificity
D000485:Allergens