Neocoronavirus adenovirus vector vaccine has a good safety profile and few adverse effects after vaccination, with the disadvantage that it may be slightly less effective than other types of neocoronavirus vaccines. The Neo-Crown Adenovirus Vector Vaccine is an adenovirus-based vaccine in which the Neo-Crown virus s-protein is recombinantly inserted into the adenovirus vector, and the vaccine is used to induce an immune response to prevent re-infection with the Neo-Crown virus. The NeoCoronavirus Vector Vaccine is a convenient vaccine that requires only one dose and is suitable for people who need to be immunized in a short period of time. Antibodies are usually produced within 14 days after vaccination. The NeoCAV vector vaccine may be slightly less effective because it is given only once, unlike other vaccines that are given multiple times to stimulate the immune system to respond and increase protection.