title: The effects of smoking on immunocompetence.
mesh_terms: D000956:Antigens, Viral; D006258:Head and Neck Neoplasms / Q000276:immunology; D006801:Humans; D007109:Immunity; D007111:Immunity, Cellular; D007070:Immunoglobulin A; D018139:Simplexvirus / Q000276:immunology; D012907:Smoking / Q000150:complications*
chemical_list: D000956:Antigens, Viral; D007070:Immunoglobulin A