Indeed, it will be probably impossible for you to leave towards such or such destination at the "last minute" if an essential vaccine is required and if that this vaccine requires few recalls. So it is better to make certain of which vaccine is obligatory or is highly recommended. For that, I personally advise you to visit this site: (http://www.traveling-doctor.com/docvac/fr/vaccins/continents.cfm) which will enable you to have all information relative to the various essential vaccines for the country of destination.
These questions answered, I believe you are now ready to come over to reserve your trip at JLM Travel. And if you still have other questions relating to the choice of your destination I will be always there to answer you. I hope to see you soon, and in the mean time, please find some more tips