The main reason for only one injection of Concinol New Crown vaccine is that this vaccine is an adenovirus vector vaccine, which can realize the dual protection of humoral immunity and cellular immunity. Concinol vaccine is a recently launched vaccine, basically only one injection is enough because this is an adenovirus vector vaccine, which has certain biological activity itself, and after one injection it can effectively activate the body’s immunity to protect against the NeoCornea virus. However, at present, a booster dose is required when 6 months have elapsed after the administration of one dose of Concinol New Crown vaccine. Generally speaking, the inactivated vaccine is mainly to produce humoral immunity, which is more effective for general viruses, but for viruses like New Crown that can easily invade the inside of the body’s cells, it is difficult to achieve the effect of just one injection, so it is necessary to utilize cellular immunity to prevent them. After vaccination, patients should wait for about 30 minutes at the site and rest before leaving. In addition, it is important to rest and drink plenty of water.