Many prospective Adjustment of Status applicants are aware of the requirement to undergo a medical examination by a USCIS designated Civil Surgeon. An often over looked aspect of the exam, however, is the need to provide immunization records to avoid duplicative inoculations. It often takes time to locate immunization records, particularly when they are kept abroad. Avoid delays or unnecessary vaccinations and fees by locating your immunization records today. Visa numbers may become current sooner than you expect.

http://www.uscis.gov/news/questions-and-answers/vaccination-requirements