polymerase chain reaction
The tests use a method called polymerase chain reaction, or PCR, to detect genetic materials—bits of viral RNA—that are present in the body when the virus is active.Denise Chow

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Cite this Entry

“PCR.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/PCR. Accessed 17 Nov. 2024.

Medical Definition

PCR

abbreviation
polymerase chain reaction

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