By Tim Hanlon A new hand-held device can test for breast cancer in under five seconds using a tiny sample of saliva, say researchers. The portable device is not only extremely quick and easy to use but very cost effective, say scientists, as it retails at £3.95, and the test strips are just a few pence each. The design uses common components such as widely available glucose testing strips and the open-source hardware-software platform Arduino. Researchers note that this device is revolutionary compared to the alternatives of Mammograms, ultrasounds, and MRIs which expose you to radiation and a…