Your system wouldnt be immune to it. I've not had my TB jab, they stopped doing it this year in schools cause its on the decreases, doctors wouldnt do it for me neither. Thing is, theyre not doing it because its on the decrease, which is obviously gonna make it go on the increase isn't it? If people arent becoming immune from it, people will get it, spread it to more who aren't immune then there'll be an epidemic. Stupid really.