A village, no sickness to speak of, so not much health care. Over time some chemicals in the water flowing in from the north make a lot of the people sick. Outsiders assume the lack of health care is the culprit. The lack of available health care will affect treating these people, but it will not solve what is causing the sickness.
Treat the symptoms alone or treat the symptoms and stop the chemicals. What if the plant dumping the chemicals in the water is the employer all of the folks in the village?
Lots of questions huh? Use your imagination.