Well, considering we are here for different reasons than heroin addicts, we should have nothing to fear from this. And I don't know what it's like to try to b reak an addiction as powerful as heroin, so maybe for them it helps I don't know. I have no need to be vaccinated, because I'm appearently going to be on the meds I'm on the rest of my life...but I don't fear that this is out there, not yet anyway. Again, DON'T misunderstand me....THIS SHOULD BE STRICTLY VOLUNTARY, if it helps, go with god, if not it was an Idea