Slums are - - -
breeding grounds for pestilence, due in large part to poor sanitation, poor dietary options, and high stress situations.
At least in the countryside, the chances of disease are lessened by lack of over-crowding, availability of better quality food and sanitation. The only drawbacks I foresee is the lack of variety of food and the greater travel distances required. But the more relaxed conditions in rural areas reduces the health concerns of many people. Many medical tests that require high technology (MRI, CAT scans, etc.) are needed for those health concerns CAUSED by those high stress situations. While useful, they are much less needed in rural areas.
