PCR, or polymerase chain reaction, is a widely spread method it is used to rapidly make billions of copies of a specific DNA sample so in this way allow the scientists to take a very small sample of DNA and amplify it to a large enough amount to study in detail.
As the coronavirus that causes the COVID-19 disease spreads across the world the hospital doctors used the PCR technique to detect this virus by getting either a negative or positive result.
1) Denaturation the separation of the double strand DNA
2) Annealing the primers binds to each of the single-stranded DNA template
3) Extension the DNA polymerase synthesizes a new DNA strand complementary to the DNA template strand.
https://youtu.be/iQsu3Kz9NYo
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