go to the doctor and get a prescription. they'll give you options to choose from because the vaccines that are available have side effects (at least the ones discussed with us). i've forgotten what the other options are but the one prescribed to us was doxycycline, which is an antibiotic you need to take orally one or two days before heading out to the place with high risk of malaria. we ended up not taking them though because the area we went to turned out to be low risk and the possible side effects outweigh the benefits of taking them and the doctor actually discouraged us. but you need to discuss the details of your trip with your doctor as there may be different requirements for your body, the area you are going to and the length of your stay. enjoy your trip and stay safe :)