New Crown asymptomatic infections are currently divided into two main categories, one in which nucleic acid tests are mostly positive and the other in which they are negative. An infected person is positive as long as their viral load is detectable. The details are as follows: 1. The first category of asymptomatic infected patients is those who are currently carrying the new coronavirus, but the concentration of the new coronavirus in the body is not large, and the degree of infection is very mild, with no physical symptoms. However, the viral load of the infected person can be detected, and the nucleic acid test of this kind of people is often positive, which is a group of people with strong infectiousness. 2. The second type of asymptomatic infected people is those who are not currently carrying the new coronavirus. This group of people is often infected with the new coronavirus, but did not show symptoms of new coronavirus infection in the population, in the subsequent viral antibody test, found that the immune antibody is positive, this kind of patient new coronavirus nucleic acid test can be negative, but may also be positive. Once the nucleic acid test result is positive, it is important to isolate them for treatment to avoid the spread of the epidemic.