The main feature of inactivated vaccine is that the composition of vaccine is similar to that of natural virus, which is the closest. Inactivated vaccines usually have strong immune response and good safety. They can be stored for two to three years at 2℃ to 8℃ for a long time, with convenient transportation and relatively stable overall. Two injections were used for immunization.
Adenovirus vector vaccine is a live vector vaccine made by introducing the new coronavirus antigen gene into adenovirus type 5 in China. The preparation process is relatively simple and the cost is relatively low. The immunization procedure adopted is one-time immunization.
People who are not suitable for domestic COVID-19 vaccine include pregnant women and lactating women, but there is no regulation for pregnant women. In this regard, Xiao Mei suggested that there is still a lack of large-scale research on pregnant and lactating women, so it is impossible to determine the safety of COVID-19 vaccine for pregnant and lactating women and their offspring. Therefore, pregnant women and lactating women are not recommended to be vaccinated with COVID-19 vaccine. In theory, pregnant women can be vaccinated with inactivated COVID-19 vaccine, but it is recommended to get pregnant three months after two doses of COVID-19 vaccine, and take contraceptive measures during the vaccination period to avoid unintended pregnancy. If pregnancy is found during vaccination in COVID-19, there is still no relevant research evidence to determine whether pregnancy can continue. In case of unexpected pregnancy, you should consult a doctor and make a comprehensive decision according to your personal situation.