Two bars of antigen are shallow, that is, two bars of neocoronavirus antigen test are shallow, some people have two very shallow bars of antigen considerations related to short observation time, improper operation or in the early stage of the disease, etc.. Part of the population using the new coronavirus antigen test found two very shallow bar to consider a short interval observation time has a certain relationship, if infected with the new coronavirus, with the passage of time, the two bars will be gradually obvious. At the same time, some people may use the new coronavirus antigen test improperly or the antigen test kit is outdated or substandard, etc., which may also lead to the two shallow bars of antigen. Due to the lack of sensitivity of the Neocoronavirus antigen test, some people in the early stages of Neocoronavirus pneumonia may also have very light antigen bars. For those with very light antigen bars, they should be reported to the community or go to regular hospitals for examination to ascertain whether they are infected with novel coronavirus. It is recommended to follow the instructions strictly to ensure the accuracy of the test results. Daily attention should be paid to good protective measures, such as wearing masks, hand washing, etc., to avoid close contact with others. Tips] In this article, “new coronavirus pneumonia” and “new coronavirus pneumonia” have been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.