Don't mess with other civilizations.
That's the "prime directive" in Star Trek and countless other sci-fi works. Of course, visitors to other planets get it wrong — a lot. Sometimes, they meddle in inappropriate ways and disaster ensues.
So what does this have to do with global health?
Well, here on Earth, doctors and medical students are flocking to programs where they spend a couple of weeks to months volunteering in what's called a "low-resource" country. In these places, medical expertise and technology may lag behind richer nations.