title: Possible case-to-case transmission of legionnaires' disease.
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007877:Legionnaires' Disease / Q000453:epidemiology / Q000635:transmission*; D008297:Male; D008875:Middle Aged; D012606:Scotland; D013030:Spain