Omicron BA.5 is an omicron variant of the Neocoronavirus, which can lead to the development of a new type of coronavirus pneumonia. Like other viruses, neocoronaviruses evolve gradually, and omicron is one of the mutated strains. Since the first report of an omicron variant in southern Africa, several sub-spectrums have been identified. The earliest omicron variant is sub-spectrum BA.1, while others include recombinant strains such as XE (which is a recombinant variant of BA.1 and BA.2), as well as new sub-spectrum strains such as BA.2.12.1, BA.4, and BA.5. Currently, the Omicron subtype strain BA.5 has been detected in China, which is more infectious and has increased immune escape ability. Epidemic at the moment, need to do their own protection, such as fever, malaise, dry cough and other discomforts, timely fever clinic consultation. [Tip] This article refers to the “new coronavirus pneumonia, new coronavirus pneumonia”, etc., has been December 26, 2022, the National Health Commission issued a notice to change the name to the “new coronavirus infection”.