New Crown Adenovirus Vector Vaccine and Inactivated Vaccine are both relatively safe in terms of safety, only that they are made in different ways and each has its own advantages and disadvantages. Adenovirus-vectored vaccines, with stronger immune effects, are suitable for people without underlying diseases and in relatively good health; inactivated vaccines tend to require multiple injections, but adverse reactions are generally lower. Inactivated vaccine is to purify and inactivate disease-causing microorganisms cultured in vitro. After inactivation, the disease-causing microorganisms no longer have the ability to cause disease, but a small portion of their antigenic fragments can still stimulate the body’s weak immune response, so inactivated vaccines usually require multiple injections, but their adverse reactions are generally lower. Inactivated vaccines are recommended to be preferred for people with weakened immunity or immune system disorders. The adenovirus vector vaccine removes the original replication-related genes from the adenovirus and replaces them with genes for the neocoronavirus spiking protein (S protein). The purpose of this is to allow the reassembled virus to replicate the neocoronavirus spiking protein, thereby stimulating our immune system to initiate an immune response and generate immune memory. It is more suitable for people who have no underlying disease and are in relatively good health. Although the two types of vaccines, adenovirus vector vaccine and inactivated vaccine, have their own advantages and disadvantages, both of them must be safe, effective and of controlled quality before they are approved by the State Drug Administration, so you can be assured that they are safe to be vaccinated, and please follow your doctor’s instructions.