How healthy is your neighborhood? Geo-Medicine exploits GPS mapping, more generally GIS "geographic information systems", to identify geographical correlates to health such as proximity to fast food, medical care, pharmacies, sidewalks, and grocery stores.
Most interesting to me was
...Asthmapolis, has attached a GPS sensor atop asthma inhalers to allow patients and their doctors to track and map attacks and gain new insights into what triggers them. Once the data is "de-identified" to protect patient privacy, it'll be sent to researchers investigating the causes of the condition.
However, Geo-Medicine should really be a global discipline, not just a high tech perk for the wealthiest sections of the US. This article was blind to worldwide geographical health disparities. My friend Bill grew up in China. He often described the apparent early aging of his age cohort who stayed there compared to Chinese immigrants to the US, in terms of the worse air and other kinds of pollution. He'd returned more than a decade ago to create a company that removes pollution from coal power plant smokestacks. This morning he called me to report his two week hospitalization for a stroke. Bill is twenty years younger than I, so this was a shock. He's now experiencing premature aging himself, and partly blames local air quality.
Image from A few issues surrounding China Air Pollution