Present status of cholera vaccines.
D002772:Cholera Toxin / Q000276:immunology; D022121:Cholera Vaccines / Q000276:immunology*; D006801:Humans; D014613:Vaccines, Attenuated / Q000276:immunology; D014734:Vibrio cholerae / Q000276:immunology
D022121:Cholera Vaccines; D014613:Vaccines, Attenuated; D002772:Cholera Toxin