week 4

http://mashable.com/2015/01/18/temporary-tattoo-blood-sugar/

For what now seems to be many years, scientists and doctors have tried to come up with a less "painful" way of checking on your health. A year ago Google announced that it was developing contact lenses that measure glucose levels in its user's tears. But now, Nano engineers may have found an even easier way for diabetes patients to monitor their vital levels: with temporary tattoos! A student at the University of California in San Diego has come up with a flexible mild electrical current to measure glucose levels in a person's body with a simple application. Bandodkar states the tattoo will eventually have "Bluetooth capabilities to send this information directly to the patient's doctor in real-time or store data in the cloud."
This article caught my intention because inventions such as this "Tattoo" will be able to be used to monitor levels of other blood samples in the near future.