Water supply hygiene.
D004196:Disease Outbreaks / Q000517:prevention & control; D006801:Humans; D012485:Salmonella typhi / Q000472:pathogenicity; D014435:Typhoid Fever / Q000382:microbiology / Q000517:prevention & control; D006113:United Kingdom; D014871:Water Microbiology; D014876:Water Pollution / Q000517:prevention & control*; D014881:Water Supply