Vaccinations for travelers: new technology, new vaccines, new strategies

To improve compliance with vaccines and to achieve greater efficacy, a new generation of vaccines is needed. These may be combinations of existing vaccines, but much more exciting are prospects of new formulations with controlled release and novel adjuvants. The ultimate goal is one single injection (or, even better, oral dose, but this is difficult to achieve) in childhood, and another when subjects such as travelers start to expose themselves to specific infectious risks.