STDs may be able to be diagnosed by "patients" themselves, using their computer or even mobile phone. The U.K. hopes this will help stem the rising tide of chlamydia gonorrhea, and herpes, among young people. To complete the test, people who suspect they have been infected will put urine or saliva on a computer chip or device about the size of a USB flash drive, plug it into their phone (we assume, a smartphone) or computer and receive a diagnosis within a few minutes. They will be told if th...