[Virus infections and their significance in water hygiene].
D003141:Communicable Diseases; D006506:Hepatitis A; D006801:Humans; D006920:Hygiene; D011051:Poliomyelitis; D012499:Sanitation; D013551:Swimming Pools; D014777:Virus Diseases; D014867:Water
D014867:Water
HEPATITIS, INFECTIOUS; POLIOMYELITIS; SANITATION; SWIMMING POOLS