I know how you feel Im trying to decide on if I should get one or not for Belize, Costa Rica and Panama. Seems the shot can have side effects, however thousands of people have died from yellow fever it's a very bad disease. I probally will get it because mosquitos love to bite me, and it only takes one bite. Call around different doctors also keep in mind where you will be at in the port. If your in the city you may be fine not the same for the rainforest. Check with center for disease control as well as your local health department. Good luck.