A portion of the new crown-positive population may present as asymptomatic infected persons; another portion of the population are patients with novel coronavirus pneumonia, who may present with varying degrees of fever, dry cough, malaise, nasal congestion, sore throat, runny nose, and diminished or loss of the sense of smell and taste. The majority of people who are neocoronavirus-positive, especially those who have been vaccinated or infected with the omicron strain, may present as asymptomatic infections, i.e., they have no clinically noticeable physical discomfort but test positive for the nucleic acid of the neocoronavirus. Patients with new coronavirus pneumonia mainly present with fever, dry cough, malaise, etc., accompanied by varying degrees of nasal congestion, sore throat, runny nose, decreased or loss of smell and taste, abdominal pain, diarrhea, etc. In severe cases, respiratory distress, hypoxemia, acute respiratory distress syndrome, and multi-organ failure may occur. It is recommended that people who suspect that they may be infected with the new coronavirus should seek medical attention in a timely manner to do the relevant tests and be judged by a doctor. 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.