I came across this article about a British GP working in Afghanistan on the BBC site. I thought it was a very interesting and humbling read.
I hope you find it interesting too.
http://news.bbc.co.uk/1/hi/uk/6988551.stm
Handing out pills from the back of his white van - the mobile clinic - I asked Dr Duncan whether it was all worth it.

"Oh yeah," he replied, quite energetically. "No question about it. We're not going to be here forever, and we are having an effect on the health of the population which we couldn't do in the UK and that's a very satisfying feeling.

"It's not easy. You can't change the world in a day or save the world in six weeks, but slowly, slowly we can make some inroads. It's very hard, but it's very good."
Peace