You said without any qualification "you are not becoming a doctor". This is the first time you really made any qualification. Perhaps you should take a logic class. And, really, no matter what, given special accomodations (which happens all the time for different sorts of people) you should be able to get through med school without having to use a sharp object on a patient and then go into a field where you never use sharp objects on patients. And if a school kicks a student out for having HBV, they would get sued and lose. So there is really no situation where your statement is correct.
Learn to admit when you are wrong, it will serve you well in life.