I believe you are over thinking your situation. Pardon me if I am wrong, I could be wrong but I believe that if your current medical condition has nothing to do or is not related to drug abuse, mental or physical disorder with a history of harmful behavior or Infectious diseases that might pose a risk to the general public. You don't have nothing to worry about.
Now, regarding the vaccines that are required before entering the United States I believe there isn't much you can do here, you need to go to your medical examination, explain your situation regarding the vaccines and they will determine which vaccines you need based on your current medical situation, records, and also based on the requirements from US Embassy in your home country in order to grant you the immigrant visa.
If the medical examination determines that you need some vaccines before the visa interview and you still for some medical or personal reasons cannot take these vaccines then this will be a problem, most likely they will denie the visa. Good luck and keep us posted.