[Travel vaccines: what is in the pipeline?].

While no vaccine is on the horizon to prevent traveler's diarrhea, progress has been made in the field of malaria and dengue fever. In both cases, the objective is not primarily the prevention among travelers but rather the reduction of morbidity and mortality in populations living in endemic areas. The immune mechanisms protecting against parasitosis are not well understood, which further complicates vaccine development. The fact that veterinary vaccines against the parasites causing cysticercosis and echinococcosis are available for animals, justifies a certain optimism that vaccines against parasitosis will also be available for humans in the future. We report on recent developments in dengue, malaria, schistosomiasis, and hookworm vaccines.