PCR Testing, or Polymerase Chain Reaction testing, is a laboratory technique used to amplify small segments of DNA. This process allows scientists to create millions of copies of a specific DNA sequence, making it easier to study and analyze. It is widely used in various fields, including medical diagnostics, forensic science, and genetic research. In the context of COVID-19, PCR testing is crucial for detecting the presence of the virus in individuals. A sample is typically collected using a nasal swab, and the test can identify even small amounts of viral genetic material, helping to confirm infections and guide public health responses.