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Vaccination with Dukoral® against travelers’ diarrhea (ETEC) and cholera

There is currently only one vaccine available that provides protection against diarrhea caused by Vibrio cholerae and, to a lesser degree, enterotoxigenic Escherichia coli (ETEC). Adverse events of this oral whole-cell/recombinant B-subunit vaccine have been negligible. Protective efficacy against cholera is 85%, while protection against the heat-labile toxin of ETEC reaches 67%. There is still a need for data on protection of Western travelers against travelers’ diarrhea in general by Dukoral® vaccination. However, current studies show a protective effect of up to 43%. Although the vaccine is only licensed for vaccination against cholera in most Western countries, there is mounting evidence that the oral cholera vaccine is a valuable option to those traveling to high-risk endemic areas. Vaccination against cholera and ETEC should be recommended for at-risk travelers, in particular those with high exposure at their travel destination or high personal risks through fluid loss.