title: Passive smoking: nicotine, a hapten.
mesh_terms: D006241:Haptens; D006801:Humans; D009538:Nicotine / Q000276:immunology*; D014028:Tobacco Smoke Pollution / Q000009:adverse effects*
chemical_list: D006241:Haptens; D014028:Tobacco Smoke Pollution; D009538:Nicotine