New coronavirus pneumonia refers to new coronavirus pneumonia, which is a respiratory disease caused by a new coronavirus infection. After infection, the virus acts on multiple tissues of the human body, and there are mainly symptoms such as fever, cough, dry cough, diarrhea, etc. However, due to the individual differences of each person and the criticality of the patient’s condition, the manifestations of uncomfortable new coronavirus pneumonia are different, and are mainly divided into mild, common, heavy and critical: 1. The symptoms are mainly respiratory, with no clear lesions on chest X-ray and CT. 2. The patient may have wheezing, but no obvious shortness of breath and other hypoxic manifestations, sputum sounds or dry rales can be heard in the lungs, and pneumonia may appear on the chest film; 3, heavy type: after infection with the new coronavirus will develop respiratory distress, rapid progression to acute respiratory distress syndrome, septic shock, and difficult to correct metabolic acidosis and coagulation dysfunction, oxygen saturation <93%, and lesions on the chest film will Gradually exceed normal lung tissue, in addition to combined respiratory symptoms may also have metabolic disorders; 4, critical type: critical type patients will be about a week after the onset of the disease, combined with hypoxemia or respiratory distress, and is progressively aggravated, rapid decline in blood oxygen indicators, imaging shows that the lung lesions are significantly progressive, critical type patients may develop systemic symptoms after viral infection. Usually there is an incubation period of 3-7 days after novel coronavirus infection, and there are some patients who have no obvious symptoms after infection, or even throughout the course of the disease. If you have been recently exposed to the virus in a medium to high risk area or have a history of exposure to the virus, you may seek medical attention for nucleic acid testing.