You may. The only requirement by CMU is that your tetanus vaccine be up to date (within last 8-10 years). However, we suggest that you visit the CDC website for recommended immunizations for the area you will be traveling in. Typically, the CDC will have a list ranging from Hepatitis to Typhoid to Yellow Fever. They can be expensive, so we recommend that you discuss the CDC recommendations with your family physician and follow his/her recommendation.