title: Infections prevent the development of asthma--true, false or both?
authors.forename: P J
authors.initials: PJ
authors.lastname: Openshaw
authors.forename: G
authors.initials: G
authors.lastname: Walzl
mesh_terms: D000485:Allergens / Q000009:adverse effects; D001249:Asthma / Q000821:virology*; D002648:Child; D002675:Child, Preschool; D020022:Genetic Predisposition to Disease; D006801:Humans; D006967:Hypersensitivity / Q000235:genetics; D012141:Respiratory Tract Infections / Q000150:complications*; D014777:Virus Diseases / Q000150:complications*
chemical_list: D000485:Allergens