PCR is short for 'polymerase chain reaction,' big name I know, but simply put, PCR is the magnification step. It is the technique that takes even small fragments of DNA and makes them easier to study. Think rice, one grain is harder to spot, but a heap is easy to spot. PCR is a technique that takes one grain of rice, or in this case, one fragment of DNA, and makes many. Naturally, a test that uses PCR is going to be more accurate. In the case of Covid testing, the PCR test is considered the gold standard. If you want to be accurate, then the term to be used is RT-PCR. RT stands for reverse transcription; covid is not a DNA virus but an RNA virus. Reverse transcription is the step that converts RNA to DNA. So as you may have guessed, RT is step 1, PCR is step 2, and detection is step 3 when you go for covid testing. Countries that are concerned and stringent in their approach toward covid require a pcr certificate Spain . Spain, for example, requires that you prov
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