Imagine a “DNA photocopier” small enough to hold in your hand that could identify the bacteria or virus causing an infection even before the symptoms appear.
This possibility is raised by a fundamentally new method for controlling a powerful but finicky process called the polymerase chain reaction. PCR was developed in 1983 by Kary Mullis, who received the Nobel Prize for his invention. It is generally considered one of the most important advances in the field of molecular biology because it can make billions of identical copies of small segments of DNA so they can be used in molecular and genetic analyses.
To read more about the research, click here: https://news.vanderbilt.edu/2017/01/11/dna-duplicator-small-enough-to-hold-in-your-hand/