About 1600 kidney transplants are performed each year in France. The quality of life of grafted patients has therefore improved, to the extent that such patients are now envisaging professional or other activity and stays in tropical or sub-tropical regions. However, this is not without some degree of risk or difficulty. Anti-malarial drugs may interfere with other medication, particularly ciclosporin in kidney grafted patients. Moreover, other vaccinations such as anti-amaril immunization are recommended or even required by certain countries. Yet the immunodepression induced by this in grafted patients is a contraindication for such vaccination. For the other types of immunization, the risk/benefit ratio is not always obvious.