What are the symptoms of new coronary pneumonia?

COVID-19 refers to novel coronavirus, which is a respiratory disease caused by novel coronavirus infection. After infection, the virus acts on many tissues of human body, mainly showing symptoms such as fever, cough, dry cough and diarrhea. However, due to the individual differences of each person and the severity of the patient's illness, novel coronavirus's uncomfortable manifestations are different, which are mainly divided into light, ordinary, heavy and critical types:

1, mild: For patients with mild symptoms, after being infected with novel coronavirus, they usually only have cough, fever and sweating, and a few patients have symptoms of nausea and diarrhea. The symptoms are mainly respiratory symptoms, and there is no clear focus on chest radiograph and CT.

2. Ordinary type: Ordinary patients have fever and respiratory symptoms, such as fever and cough as usual, mostly dry cough at first, followed by phlegm cough, and some of them may have wheezing, but there is no obvious hypoxia such as shortness of breath. The lungs can smell phlegm or dry rales, and pneumonia can appear on the chest radiograph;

3. Severe cases: novel coronavirus will have dyspnea after infection, which will rapidly develop into acute respiratory distress syndrome, septic shock, metabolic acidosis and coagulation dysfunction that are difficult to correct. When the oxygen saturation is lower than 93%, the lesions on chest radiograph will gradually exceed normal lung tissue, and besides respiratory symptoms, there may be metabolic disorders;

4. Critically ill patients: The critically ill patients will be complicated with hypoxemia or respiratory distress about one week after onset, and their condition will gradually worsen and their blood oxygen index will drop rapidly. Imaging shows that lung lesions have progressed significantly, and severe patients can have systemic symptoms after being infected with the virus. Novel coronavirus usually has an incubation period of 3-7 days after infection. Some patients have no obvious symptoms after infection, or even no obvious symptoms during the whole course. If you are in a middle-high risk area recently or have a history of virus exposure, you can seek medical advice in time for a definite nucleic acid test.