title: First do no harm.
authors.affiliation: Division of Primary Care and Public Health, Brighton and Sussex Medical School, Brighton. E-mail: h.e.smith@bsms.ac.uk.
authors.forename: Helen
authors.initials: H
authors.lastname: Smith
authors.affiliation: Brighton and Sussex Medical School, Brighton.
authors.forename: Aisha
authors.initials: A
authors.lastname: El-Turki
authors.affiliation: Brighton and Sussex Medical School, Brighton.
authors.forename: Anthony
authors.initials: A
authors.lastname: Frew
mesh_terms: D010367:Arachis / Q000276:immunology*; D002675:Child, Preschool; D006801:Humans; D007108:Immune Tolerance; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena / Q000276:immunology*; D021183:Peanut Hypersensitivity / Q000276:immunology / Q000517:prevention & control*