Usually if you need to have your blood tested it means going to a doctor's office having some blood drawn and then waiting a while---the blood is sent to a central laboratory and then the results come back in a few days or so. But imagine if you had a gizmo that was inserted under your skin and tested your blood sending out the results wirelessly. 'too much cholesterol, not enough vitamin B!' and then you could eat right or exercise more. Scientists at the EPFL (École polytechnique fédérale de Lausanne--a great research institution in Switzerland) have developed a tiny device to do just that. The sensor is very small and it receives its power from another part of the device that is outside of your skin (think how a cordless toothbrush is charged). The results are then sent by Bluetooth to a doctors computer where the results can be interpreted.
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