Rubella DNA PCR (polymerase chain reaction) is a qualitative test used to detect the presence of rubella virus DNA in a patient’s sample. The test works by amplifying the DNA of the virus present in the sample and then detecting it using fluorescent probes. This highly sensitive test can detect the virus even when there are low levels present in the sample. The Rubella DNA PCR test is used primarily for the diagnosis of rubella infection in pregnant women, where accurate diagnosis is crucial to prevent congenital rubella syndrome in the developing fetus. The test can also be used for monitoring the effectiveness of rubella vaccination and for detecting outbreaks of rubella.