What is the geography of medical practicioners? Why are doctors concentrated more in certain parts of the country? "If anything, this map illustrates how much where you live matters for how much health care you have access to. The 17,000 residents of Clark County, Miss. do not have a single primary care doctor in the area. Up in Manhattan there is one doctor for every 500 people." Click on the link for an interactive ESRI-produced StoryMap.