There are currently 11 named mutant strains of New Coronavirus, the common ones are Beta, Delta and Omicron strains. 1. Beta: Beta is usually mutable on the spiking protein and may have immune escape, meaning that antibodies produced by the patient from previous infections or antibodies produced after vaccination may have a weakened effect on the beta strain. 2. Delta: Delta variant strains are characterized by a short incubation period, rapid transmission, high viral load, and long nucleic acid conversion time, and are usually more likely to develop critical illness than other strains. 3. Omicron: Omicron variant strains are characterized by rapid transmission, stealth, and penetration, and have more mutations than Delta strains, which may increase the risk of secondary infection with neococcal pneumonia. Mutant new coronavirus mutates quickly and is highly contagious, so patients must do a close job of protection in their daily lives to avoid infection. Tip: The term “neocoronavirus pneumonia” and “new coronavirus pneumonia” mentioned in this article were renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.