Novel coronavirus nucleic acid test is now the standard for confirming the diagnosis of novel coronavirus detection by reverse transcription polymerase chain reaction, i.e., RT-PCR experimental technique, which is done in two steps: 1, extraction of viral RNA: the new coronavirus and SARS virus and MERS virus are all RNA viruses; 2, reverse transcription and amplification of RNA viruses, the so-called RT-PCR process. These steps take at least 6-8 hours after proficiency, or for experimental verification and confirmation. Currently some simple kits can be completed within 3 hours, but results review, specimen transport and dispatch of results are also required. So currently, after clinical sampling, the results can be available on the morning of day 2 or other time, and the whole cycle is about day 2. Content source: Dr. You Lai