title: Early allergen contacts.
mesh_terms: D000293:Adolescent; D000485:Allergens / Q000276:immunology*; D000818:Animals; D002415:Cats; D002648:Child; D004285:Dogs; D004848:Epithelium / Q000276:immunology; D005512:Food Hypersensitivity / Q000276:immunology; D006801:Humans; D006967:Hypersensitivity / Q000276:immunology / Q000517:prevention & control*; D007223:Infant; D007231:Infant, Newborn; D008925:Mites / Q000276:immunology; D011058:Pollen / Q000276:immunology
chemical_list: D000485:Allergens