Today on (Sep 26, 2022) in the presence of the head of departments and lecturer a symposium entitled (PCR(polymerase chain reaction)), was presented by the medical laboratory Assistant lecturer (Ms. Jiyan Ali Haji), Where it has been explained about the recent era PCR reaction becomes one of the most dependable test, for many purpose and in different fields, such as for diagnosis and prognosis, At the end of the symposium, a set of questions and answers were raised on this subject.