Polymerase Chain Reaction (PCR) is a molecular biology technique used to amplify DNA sequences. It enables rapid detection of genetic material and is essential in diagnostics, research, forensics, and infectious disease testing due to its high sensitivity and specificity. https://medium.com/@xelleratherapeutics/polymerase-chain-reaction-pcr-the-tiny-test-that-transformed-modern-science-8e858f9b9be6