as alluded to earlier, alexander fleming realized we would run into this problem if this was not used judicially because this is normal behavior for bacteria in order to survive. >> so you've got bugs in your system. you introduce this compound to kill them, and they get used to having them around? >> they see it and start developing mechanisms almost like missiles defense systems, they learn how to cut them up, pump them out and they have genes in their chromosomes that they can turn on and they can pass it to their neighbors. they can also do--they can also sense when there is more of them in going in different forms. what is called the bio films. they get into this formation that makes it very hard for antibiotics to penetrate them. they have a whole host of defenses against antibiotics. this is something that they evolutionarily grew up with. this is not anything new for them. >> dr. sparrow in those countries in the world where medicine isn't as easily come by, where people can't necessarily visit doctors as often or as thoroughly, how does this cross the line from being merely i