During the period of epidemic prevention and control, relevant industry regulations are needed. If the restaurant tries to close the store, if it is a small shop or a fruit and vegetable shop, it is not necessary to close the store as required, because the prevention and control registration varies from place to place, and it must comply with local regulations.

Principle of nucleic acid detection

All living things contain nucleic acids, including DNA and RNA. Novel coronavirus is a virus containing only RNA, and the specific RNA sequence in the virus is a sign to distinguish the virus from other pathogens.

After the appearance of novel coronavirus, Chinese scientists completed the analysis of the whole genome sequence of novel coronavirus in a very short time, and found the specific nucleic acid sequence in novel coronavirus by comparing with the genome sequences of other species.

If novel coronavirus's specific nucleic acid sequence can be detected in patients' samples during clinical laboratory testing, it should be suggested that patients may be infected by novel coronavirus.