I will have a medical exam next week. But I just found that I don't have vaccination for Hepatitis B. As far as I know, Hepatitis B requires at least three shots with long intervals between shots. Does that mean I have to wait a long time until the three shots are finished, then they can sign my medical form? Those people who have similar situation please reply. Thanks. By the way, do they make a copy of your vaccination record and include it in the sealed envelope?(b/c I do not have official vaccination record). Thank you very much for your help.