Full Form of RT-PCR Test

RT-PCR stands for Reverse Transcription Polymerase Chain Reaction.

Let's break down the science simply:

1. Reverse Transcription (RT): The COVID-19 virus is made of RNA, not DNA. Because testing machines only work with DNA, scientists use special enzymes to convert the virus's RNA into DNA. This backward process is called 'Reverse Transcription'.
2. Polymerase Chain Reaction (PCR): Once the viral DNA is created, the PCR machine creates millions of copies (a chain reaction) of that tiny piece of DNA. By amplifying it millions of times, the machine can easily detect if the virus is present in the patient's swab sample.

The RT-PCR test is considered the best because it is incredibly sensitive and accurate. Because of the PCR amplification process, it can detect the virus even if there is only a tiny, microscopic amount of the virus present in the patient's nose or throat.