Omicron BA.5 is an Omicron variant of a new coronavirus that can cause a new type of coronavirus pneumonia when infected. There is no authoritative information showing that omicron BA.5 is more pathogenic. Compared with other omicron variant strains, omicron BA.5 is more insidious, infectious, and immune evasive, but further studies are needed to confirm the specific pathogenicity of omicron BA.5. The main sources of infection of novel coronavirus pneumonia are patients with novel coronavirus pneumonia and asymptomatic patients with novel coronavirus infection. Respiratory droplet transmission and close contact transmission are the main modes of transmission. The population is generally susceptible to it, and vaccination against the novel coronavirus has some protective effect. The occurrence of infection is closely related to the number of viruses, viral virulence, autoimmunity of the infected person, and the presence or absence of underlying diseases. Most patients have a good prognosis, while a few patients are in critical condition. It is mostly seen in the elderly, people with chronic underlying diseases, late pregnancy and perinatal women, and obese people. If you have any of the above symptoms, it is recommended that you seek timely medical attention. Tips] In this article, “new coronary pneumonia, new coronary virus pneumonia” has been renamed to “new coronary virus infection” on December 26, 2022, as announced by the National Health Commission.