title: Legionellosis and travel.
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016000:Cluster Analysis; D003430:Cross-Sectional Studies; D004739:England / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D007877:Legionnaires' Disease / Q000453:epidemiology / Q000401:mortality / Q000635:transmission*; D008297:Male; D008875:Middle Aged; D014195:Travel; D014852:Wales / Q000453:epidemiology