title: The defence of dirt.
authors.affiliation: geoff@scileg.freeserve.co.uk
authors.forename: Geoff
authors.initials: G
authors.lastname: Watts
mesh_terms: D003141:Communicable Diseases / Q000276:immunology*; D003876:Dermatitis, Atopic / Q000276:immunology*; D006801:Humans; D006920:Hygiene; D007223:Infant; D007231:Infant, Newborn