The clinical presentation of novel coronavirus pneumonia is divided into four types based on severity, namely mild, common, severe, and critical. The vast majority of people have the common type of cases, and patients will have typical symptoms of fever, cough, and malaise. Patients with the milder type have a milder presentation than the common type and may have an insignificant fever or even no fever, only a mild cough, and no symptoms of malaise. Patients with severe cases have more pronounced symptoms than the common type, such as higher body temperature, and may have dyspnea and shortness of breath. However, many severe cases are found to have no fever or only a low fever, so it is also necessary to judge based on the presence or absence of dyspnea. More meaningful is the chest CT, the more extensive the lesion, the more severe the symptoms may be. Critical cases are at risk of death, now counting 80,000 cases nationwide, and the number of deaths has exceeded 3,000. But the vast majority of people are still in the mild, common category. How to identify critical cases early and reduce the death rate is a new hot topic of concern for clinicians. The new treatment protocol published by the National Health Commission also proposes early warning indicators for heavy cases in adults and children, which can identify heavy cases earlier and further reduce the death rate of critically ill patients. Content source: Dr. You Lai