title: Genetic defect wards off AIDS infection, say researchers.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000235:genetics* / Q000276:immunology; D005802:Genes, MHC Class II / Q000235:genetics*; D006801:Humans; D009154:Mutation / Q000235:genetics; D044465:White People / Q000235:genetics