Nucleic acid testing generally refers to the New Coronavirus Nucleic Acid Test, and a negative New Coronavirus Nucleic Acid Test result generally means that the body is not infected. Neocoronavirus nucleic acid test is mainly used to detect whether the population is infected with the new coronavirus, and a negative result of this test usually means that the body is not infected, which is a normal phenomenon. However, for some people, a negative test result does not necessarily mean that they are not infected with the new coronavirus, and if they have symptoms such as coughing and fatigue, they may need to undergo a CT scan to clarify the situation. Clinical diagnosis of new coronavirus pneumonia is usually based on medical history, symptoms, and relevant examinations, and the results of the new coronavirus nucleic acid test are only used as a preliminary screening or diagnosis of the disease. If the new coronavirus nucleic acid test is positive, the patient should cooperate with the doctor for isolation and observation and further examination, so that the disease can be clarified and then treated aggressively. People are advised to cooperate with the community to complete each new coronavirus nucleic acid test in order to monitor their health condition. Wear a good mask when going out and 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.