title: Hay fever, hygiene, and household size.
authors.affiliation: Department of Epidemiology and Population Sciences, London School of Hygiene and Tropical Medicine.
authors.forename: D P
authors.initials: DP
authors.lastname: Strachan
mesh_terms: D000328:Adult; D001722:Birth Order; D002648:Child; D015331:Cohort Studies; D004485:Eczema / Q000453:epidemiology; D005191:Family Characteristics; D005500:Follow-Up Studies; D006801:Humans; D006920:Hygiene; D015995:Prevalence; D006255:Rhinitis, Allergic, Seasonal / Q000453:epidemiology*; D006113:United Kingdom / Q000453:epidemiology