Prospects of new vaccines for resurgent and emergent diseases.

Changing lifestyles around the world are contributing to the phenomenon of emergent and resurgent infections. At the same time the application of molecular techniques to the study of infection has given rise to new opportunities for the development of novel vaccines. The trend in vaccinology is towards more defined and safer vaccine formulations. Here we discuss recent developments in the field and how these might impact on resurgent and emergent infection control.