The new pneumonia is more serious than SARS, and both are coronaviruses. There are seven coronaviruses now known, the first four are less pathogenic to humans, SARS and Middle East Respiratory Syndrome are the more serious ones. The severity of this new coronavirus is low compared to SARS, which causes lung infections with more severe symptoms and causes a higher mortality rate. Lung infections caused by the new coronavirus can also present with severe symptoms, but present more often in mild patients. It is less pathogenic than SARS, but more contagious than SARS. The new coronavirus is a new virus, and its control is mainly based on timely isolation in hospitals and effective control of the source of the disease. Because it is a new virus, the human body is generally susceptible to it, especially hidden carriers of the virus, which can easily cause widespread transmission and is highly contagious. There is no possibility of attenuation of this virus, so for such susceptible people, such as patients with underlying diseases, it can lead to the possibility of death in patients. Content source: Dr. Yurai