The first case appeared in Wuhan in December 2019. The new coronavirus belongs to the Coronaviridae family and is a single-stranded RNA positive-strand virus. The virus is highly infectious, infects via droplets and contact, and mainly infects the lower respiratory tract. It has an incubation period of 1-14 days. The symptoms are not necessarily obvious. Patients may experience fever, dry cough, tiredness, mouth and nose sensory disorders. It is known that the viral spikes mainly contact ACE2 on mucosal cells for cell membrane fusion, thereby entering a large number of viral RNA and protein shells in cells, assembling them by high-profile bodies and sending them out of the cell for the next wave of infection. COVID-19 is currently pandemic and is spreading throughout the world. Therefore, the detection of COVID-19 is an urgent issue.