Environmental health, prevention and control of cholera.
D002771:Cholera / Q000517:prevention & control*; D003140:Communicable Disease Control / Q000379:methods; D004782:Environmental Health; D006266:Health Education / Q000592:standards; D006801:Humans; D006920:Hygiene; D007373:Interinstitutional Relations; D012037:Refuse Disposal / Q000592:standards; D012499:Sanitation / Q000592:standards; D014881:Water Supply / Q000592:standards