Sometime in the not-so-distant future, getting a checkup will be very different. When the doctor writes down your symptoms, it will be cross-checked with others in your area, making it easier to identify outbreaks and epidemics sooner. If you complain of shortness of breath, your phone’s heart rate monitor will instantly report how well your heart has functioned over the last month. Those readings then could be aggregated with others in your community, revealing hidden trends. As your doctor thinks about the best treatment for you, big-data analysis will help her assess how various options have worked for others with similar histories and body chemistry.
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