Yeah that theory often does not work at all. It really only works for things were most people could afford it and don’t really need it. So they could take it or leave it. NPR was doing a piece and a thing briefly talked about is how much we save no vaccinating for smallpox in the us due to doing it overseas. As much as we say we defeated a disease that is never really the case and we will more than likely see it again doing things the way we are now doing them.