Homologous booster immunization and sequential booster immunization can further improve the immune effect.
On February 19, at the press conference held by the joint prevention and control mechanism of the State Council, Wu Liangyou, deputy director of the disease control bureau of the National Health Commission, said that recently, with the approval of the joint prevention and control mechanism of the State Council, the National Health Commission has begun to deploy sequential immunization.
Sequential booster immunization refers to a booster immunization strategy using vaccines of different technical routes. According to Wang Huaqing, chief expert of immunization planning of China CDC, the sequential immunization strategy has previously been applied in polio vaccination.
Which groups can carry out sequential immunization? Wu Liangyou said that previously, target people over the age of 18 who have been vaccinated with inactivated vaccines of Sinopharm Zhongsheng Beijing company, Wuhan company and Beijing Kexing company, as well as adenovirus vector vaccine of Tianjin Cansino Biologics Inc(688185) company for six months, can receive one dose of primary homologous booster immunization, that is, strengthen with the original vaccine.
After the implementation of the sequential booster immunization strategy, the target population who has completed the whole process vaccination of the above three inactivated vaccines can also choose the recombinant protein vaccine of zhifeilongke horse or Cansino Biologics Inc(688185) adenovirus vector vaccine for sequential booster immunization. For the target population, select one of homologous booster immunization and sequential booster immunization.
Wu Liangyou said that in addition, the joint prevention and control mechanism of the State Council also approved the homologous enhanced immunization of covid-19 virus inactivated vaccine of Shenzhen Kangtai company and the Institute of biology of the medical college. Both homologous enhancement and sequential enhancement are implemented in people over the age of 18 who have completed the whole process of vaccination for 6 months.
Wang Huaqing emphasized four points on the precautions for sequential immunization.
The first is for people over the age of 18.
The second is to complete two doses of inactivated vaccine, and these two doses are covid-19 virus inactivated vaccine of Sinopharm Zhongsheng Beijing company, Beijing Kexing company and Sinopharm Zhongsheng Wuhan company.
The third is to complete two doses of vaccination in the whole process, and the vaccination interval should not be less than 6 months.
Fourth, there has been no booster immunization.
Wu Liangyou pointed out that the research data show that homologous enhanced immunization and sequential enhanced immunization can further improve the immune effect. It is hoped that people who meet the vaccination conditions can take the initiative to vaccinate and vaccinate as soon as possible, so as to add weight to their health and refuel for epidemic prevention.
