As we all know, vaccination against COVID-19 is an effective way to obtain immunity and protection. When the vaccination rate reaches a certain level, a corresponding immune barrier can be formed in the population. Sun Xiaodong, deputy director of the Shanghai Center for Disease Control and Prevention, said that vaccination against the new crown virus is not only a kind of protection for one’s own health and the surrounding people who have not been vaccinated due to contraindications and other reasons, but also the key to blocking the epidemic of the new crown virus. You must know that the effect of the new crown vaccine on preventing severe, critical illness and even death is very obvious. According to the latest monitoring data from Shanghai, the basic immunization against the new coronavirus has a protective effect of more than 60% in preventing severe illness, and the protective effect of the booster immunization can exceed 90%.
At present, there are three main types of basic immunizations for the new coronavirus in my country: adenovirus vector vaccines (1 dose), inactivated vaccines (2 doses) and recombinant protein vaccines (3 doses). agent). A booster shot is a follow-up shot of the basic immunization shot. A booster shot after the basic vaccine shot can stimulate the immune response again and bring the antibody level to a peak.
Is it better to “mix”?
Strictly speaking, sequential booster immunization cannot be simply equivalent to mixed vaccination.
According to the deployment of the National Health and Health Commission, all target groups who have been vaccinated with inactivated vaccines or Tianjin CanSino’s adenovirus vector vaccines can carry out one-dose homologous boosting. Immunization, ie, boosting with the original vaccine.
The principle of sequential booster immunization is that the first 2 doses of inactivated vaccine must be administered. Sequential booster immunization. Sequential booster immunizations cannot currently be performed if recombinant protein vaccines or adenovirus vector vaccines were previously selected.
According to the current research data, both homologous booster immunization and sequential booster immunization can further improve the immune effect. It is hoped that people who meet the vaccination conditions can be vaccinated actively and early.
Who is eligible for sequential immunization?
➊People over 18 years of age;
➋Complete 2 doses of inactivated vaccine, these 2 The doses of vaccination must be the new coronavirus inactivated vaccine produced by Sinopharm Zhongsheng Beijing Company, Beijing Kexing Company, and Sinopharm Zhongsheng Wuhan Company;
➌Complete 2 For doses of vaccination, the interval between sequential booster immunizations cannot be shorter than 6 months; .
Is it still possible to get a booster shot after more than 6 months of treatment?
Eligible people should be vaccinated with the new crown vaccine as soon as possible. If the basic immunization has been completed for 6 months, booster doses should be vaccinated as soon as possible. Generally speaking, as long as the booster is vaccinated for more than 6 months, the effect will not be much different, but it cannot be extended indefinitely. It is recommended to vaccinate as soon as possible within the specified time range.
Where can I currently get the Covid-19 vaccine?
*Updated: June 15, 2022
Xuhui District Health Commission