goes back to the discussion of how large a level of interference the authorities can have with your life. in a cost/benefit analysis you could claim that through implementing measures which bars people with these diseases to multiply, you can actually eradicate these diseases. individual vs the greater good, the sacrifice of not being able to reproduce for a small percentage of people does good to the race in general in the long haul. problem is that it's a slippery slope to go on banning basic human rights for certain people, really yucky scenario if we get a precedent like that.