One of the fastest growing techniques in modern medicine is the use of polymerase chain reactions (PCRs) to diagnose diseases. This method is currently being used to diagnose cancer, hereditary diseases and some infectious diseases. It was first developed in 1983, by Dr Kary Mullis, and went on to win the Nobel Prize for his discovery and work in this area. Although the technology was extremely basic to start off with it has come a long way since. The basic reaction requires no more than a heat
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