Joke Collection Website - Public benefit messages - Fengtai needs several days of nucleic acid.

Fengtai needs several days of nucleic acid.

Third. Fengtai related information shows that Fengtai requires 3 days of nucleic acid. Fengtai District of Beijing insists on civil air defense inspection, requiring all employees of imported cold chain food to hold negative certificates of nucleic acid detection within 3 days, and maintaining the frequency of nucleic acid detection for relevant residents every 15 days.