The U.S. Centers for Disease Control and Prevention does not recommend cholera vaccines for most travelers. (Such a vaccine is not available in the United States.)
Travelers should always take precautions with food and drinking water, even if vaccinated.
When outbreaks of cholera occur, efforts should be directed toward establishing clean water, food, and sanitation, because vaccination is not very effective in managing outbreaks.
Crump J, Bopp C, Greene KD, Kubota KA, Middendorf RL, Wells JG, Mintz ED. Emergence of toxigenic Vibrio cholerae O141 causing cholera-like diarrhea and bloodstream infection in the United States. Journal of Infectious Diseases. 2003;187:866-868.
Steinberg EB, Green KD, Bopp CA, Cameron DN, Wells JG, Mintz ED. Cholera in the United States, 1995-2000: trends at the end of the millennium. J Infect Dis. 2001; 184: 799-802.