Polymerase chain reaction (PCR) and cycle threshold (Ct) values in COVID-19 testing
Most tests that detect the ribonucleic acid (RNA) or genetic fingerprint of the virus that causes COVID-19 (e.g., a polymerase chain reaction, or PCR test) use a process where specific bits of the genetic fingerprint are amplified using a temperature cycling reaction that repeats up to 45 times....
Organization:
Public Health Agency of Canada
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