Xinhua News Agency, Beijing, February 19 (Reporter Xu Penghang, Gu Tiancheng) Wu Liangyou, deputy director of the CDC of the National Health and Wellness Commission, introduced at the press conference of the joint prevention and control mechanism in the State Council on February 19 that the National Health and Wellness Commission has recently started to deploy sequential enhanced immunization with the approval of the joint prevention and control mechanism in the State Council.
Sequential inoculation refers to interval inoculation (alternate inoculation) of the same vaccine with different technical routes. Shao Yiming, a member of the expert group of vaccine research and development special class of the State Council Joint Prevention and Control Mechanism, said that for viruses with strong variability and difficult to deal with, sequential immunization is often adopted.
Shao Yiming said that there are two main purposes to adopt sequential immunization: one is that different vaccines can complement each other, and the other is that different personal constitutions may have more side effects on a certain type of vaccine, and vaccination with different technical routes can avoid side effects.
Wang Huaqing, chief expert of immunization program of China CDC, said that some countries in America, Europe and Southeast Asia have started to implement sequential immunization. The World Health Organization supports flexible homologous and heterologous vaccination programs. For countries considering heterogeneous vaccination, it is recommended to adopt Covid-19 vaccine with different technical routes from the first vaccination for subsequent doses.
What are the precautions for receiving sequential booster immunization? Wang Huaqing introduced that there are four important conditions for sequential immunization:
First, the target of this sequential booster immunization is people over 18 years old.
Secondly, the vaccinated object must meet the conditions of having completed two doses of inactivated vaccine inoculation, and these two doses were inoculated with Covid-19 inactivated vaccine from Sinopharm Zhongsheng Beijing Company, Beijing Kexing Company and Sinopharm Zhongsheng Wuhan Company.
Third, two doses of inactivated vaccine should be inoculated in the whole process, and the inoculation interval should not be shorter than 6 months.
Fourth, the vaccinated subjects have not been vaccinated, that is, they have not received the third injection.
Wang Huaqing suggested that you should truthfully report your health status to the vaccinator when you are vaccinated, and you should stay under observation for 30 minutes after vaccination. If there are any adverse reactions suspected to be related to vaccination, if the symptoms are serious for a long time, you should report to the vaccinator and seek medical advice in time.
"The research data show that both homologous immunization and sequential immunization can further improve the immune effect." Wu Liangyou called on people who meet the vaccination conditions to take the initiative to vaccinate and vaccinate as soon as possible.
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