(CNN) -- One is widespread but has key shortages across its supply chain. One remains questionably reliable and is only helpful after the fact. And one is still early in development -- but could speed ...

Polymerase chain reaction (PCR) is a fundamental molecular biology tool that scientists use to amplify and analyze genetic material, such as DNA and RNA. PCR involves the enzymatic amplification of ...

PCR duplicates—sequencing reads from the same original genomic fragment—can cause headaches. But there are remedies. You have full access to this article via your institution. Plenty can go wrong when ...

Editor’s Note: After publication of this story, Virginia began to provide separate viral and antibody test data. Meanwhile, three other states and the CDC seem to be mixing their COVID-19 test types.

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COVID-19 rapid tests are distributed in Brooklyn in late December. Self-tests are in short supply in many parts of the country. (Bryan R. Smith/AFP via Getty Images) There's the rapid, do-it-yourself ...

With laboratory methods and diagnostics advancing apace, Francesca Lake considers whether PCR is likely to retain its crown as an essential lab method, or whether it could be replaced and consigned to ...