Vaccinations?

Do I absolutely need to get vaccinated before I go to Caracas? Or do I not need it? Because its too expensive, couple hundred dollars. More than people in Venezuela make in a year. If there is any basic vaccinations I should get tell me what they are called and how much they cost because the doctor wasn't helpful and got mad and annoyed with me with each general question i asked. im a young guy from canada. thanx. and i think ill go to other places in south america too... but probably not the amazon. because obviously those are the playgrounds for millionaires and big travel nerds who know everything and do everything right.