Naw...stop worrying. If it were any danger, they would make you take malaria pills/shots, etc. or they would just not go to that port! My sister just left today for Brazil and she had to have ALL kinds of shots, pills, etc. Its just "one of those recommended practices of the UBS I guess. Go have fun! Sure not gonna stop me! They just won't get my blood -- and let me tell you, I have some awesome blood!