Many traveler suffer from temporary diarrhoea at some point during their trip abroad. Often the symptoms are short-lived, but sometimes fever and vomiting occur. Liquid loss can be large and there is a risk of dehydration. Tourist diarrhoea is most often caused by bacteria that are spread with contaminated food and water. Short-term protection against diarrhoea – caused by a type of E. coli bacterium, ETEC – can be achieved through vaccination.