The use of Concinol New Crown vaccine has not been discontinued. The Concinol NeoCrown vaccine is an adenovirus-vectored vaccine that is given as a basic immunization with one dose, followed by a booster dose at 6 months of age. Because it was introduced after the inactivated vaccine, the majority of the population had already received the inactivated vaccine, so fewer people were vaccinated. Nowadays, Conocinol NeoCrown vaccine can also be used for sequential booster immunization. Some people may have symptoms of redness, swelling, hardness and pain at the site of vaccination, or nausea, muscle pain, fever, malaise, etc. After vaccination with Concinol New Crown Vaccine, usually there is no need for special treatment, and it will disappear after a period of time, but if the situation is more serious, it is necessary to go to the hospital in a timely manner.