Microbiology / Medical Microbiology / Adolescent / Diarrhea / Humans / Child / Female / Male / Cholera / Aged / Middle Aged / Adult / Public health systems and services research / Cholera toxin-b / Hemorrhage / Child / Female / Male / Cholera / Aged / Middle Aged / Adult / Public health systems and services research / Cholera toxin-b / Hemorrhage