In general, it takes 7- 14 days for the nucleic acid detection of coronavirus A entering Yang Kang to turn positive. However, if the illness is serious, the time may be relatively extended. Usually, due to different personal constitutions, the time for novel coronavirus nucleic acid detection to turn from positive to negative is not fixed.

Clinically, most people who are positive for novel coronavirus nucleic acid test will have mild discomfort symptoms such as dry throat, sore throat and weakness after infection 1 day, and then they will have persistent discomfort symptoms such as dry throat, sore throat, weakness, itchy throat and cough, runny nose and stuffy nose and gastrointestinal discomfort on the second to fifth day after infection. Some patients may have fever above 39℃, but usually their body temperature begins to drop around the fourth day and symptoms begin to appear. On the sixth day after drying, most of the symptoms were relieved, while the symptoms of itchy throat, cough, runny nose and stuffy nose were aggravated, and the nucleic acid results might turn negative. On the 7th day, all the symptoms can be obviously improved, and the nucleic acid test is likely to turn negative, so we can go to Yang Kang in another week or so.