PCR test, which is called Polymerase Chain Reaction in medical language, is a concept that most individuals meet during the epidemic days. Therefore, what is the PCR test and are the PCR test results safe; questions are frequently asked. Polymerase Chain Reaction or PRC test is a method used in scientific research. With the PCR test, the presence of the virus in the person’s body is sought. In addition, in these tests, the body’s response to the virus present in the body is also investigated. PCR can detect not only viruses but also all pathogenic factors such as bacteria and microbes in the body.