Nucleic acid testing is generally used to test for neo-coronavirus infection, and a single nucleic acid test can generally be done for a week. Because the incubation period of NPV is mostly 3-7 days, the frequency of 7 days facilitates observation and timely detection of infection. However, the effective time of nucleic acid test is also related to whether the patient is infected with the new coronavirus, whether the patient has a history of exposure to the new coronavirus and whether the patient is in a high school or low risk area, etc. 1. If it is a suspected new coronavirus infected person with a history of exposure to new coronavirus, generally need to isolate 14 days, during this period every 24 hours to do nucleic acid testing, if found positive results should immediately take treatment measures, if negative should cooperate with continued nucleic acid testing until the end of isolation; 3, high school and low risk area population: this situation needs to be decided according to local policy, in general, the high risk area population every 2 In general, people in high-risk areas should do nucleic acid testing every 2 days until the high-risk signal is lifted in this area. In general, people in high-risk areas should have nucleic acid testing every 2 days until the high-risk signal is cleared. In conclusion, the exact duration of the nucleic acid test for the new coronavirus depends on your own situation and local policies, and you can consult with your local community service and hospital health personnel.