Polimerase Chain Reaction (PCR)

Polymerase Chain Reaction, or PCR, is a process which permits scientists to make unlimited copies of genes. This is done with a single molecule of DNA. One hundred billion copies of the DNA can be generated in a few hours.
This technique is currently being used to investigate Andy’s CMV because of a positive CMV antigen on his blood.
More definitions of PCR on the web via Google here.
More via Wikipedia here.

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