If somebody is considering being willing to go out and work in the field in global health, those are a particular class of heroes because it's hard to work in those places. Our foundation gets so many of our learnings from people who've been out there and seen, "this tool is not going to work there, there's more of a problem here than you know. " You should really get involved in that.
In the meane time know this, that the learning of warranties is one of the most curious and cunning learnings of the law, and of great use and consequence.