Nebulized inhaled neo-crown vaccine is usually administered through the respiratory tract by means of a nebulizer. Nebulized inhaled neo-crown vaccine, i.e., a nebulizer is used to atomize the vaccine into tiny particles, which are breathed in to enter the respiratory tract and lungs, thus stimulating mucosal immunity and providing immune protection to the body. This type of inhaled NeoCrown vaccine reduces the incidence of adverse reactions. Immunization by nebulized inhalation is less damaging and has a higher prevalence. The intramuscular injection of the vaccine causes local pain and may cause strong allergic or adverse reactions, which can be better avoided by nebulizing the vaccine.