Personnel in high-risk positions should try to avoid traveling. Those who really need to travel must leave their posts for more than 14 days, hold a negative certificate of nucleic acid test within 48 hours, and report to their unit.
Nucleic acid is the general name of deoxyribonucleic acid and ribonucleic acid, and it is a biomacromolecule compound polymerized by many nucleotide monomers. It is one of the most basic substances in life. Nucleic acid is a biopolymer, an essential component of all known life forms, the most important substance of all biomolecules, and widely exists in all animal and plant cells and microorganisms.