Legionellosis update.
D005260:Female; D006801:Humans; D007876:Legionellosis / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission; D007877:Legionnaires' Disease / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance; D014195:Travel; D006113:United Kingdom