What does sequential vaccination of the new coronavirus vaccine mean? Is sequential vaccination the fourth shot?

Sequential booster vaccination has recently been launched in many places in China, but many people do not understand the sequential vaccination very well. So what does the sequential vaccination of the new crown vaccine mean? Is the sequential vaccination of the new crown vaccine the fourth shot? What are the requirements for sequential booster immunization? What does sequential vaccination of the COVID-19 vaccine mean?

To put it simply, the third shot is not an inactivated vaccine such as Sinovac or Biotech, but an adenovirus vaccine or mRNA vaccine or any other non-inactivated route. vaccine.

Sequential booster vaccination refers to the interval vaccination (alternating vaccination) of the same vaccine with different technical routes. Taking the COVID-19 vaccine as an example, if two doses of the COVID-19 vaccine with an inactivated process have been previously completed, and any other non-inactivated COVID-19 vaccine is used when a subsequent booster shot is required, it is called "sequential booster vaccination."

There are two main purposes for using sequential booster immunization: first, different vaccines can complement each other's advantages; second, individual physiques are different, which may cause more side effects to a certain type of vaccine and use different technologies. Route vaccination can avoid side effects. Is the fourth shot of the sequential vaccination of the new crown vaccine?

No, it is still the third shot.

There are four important conditions for sequential booster immunization

1. The vaccination targets for this sequential booster immunization are people over 18 years old.

2. The vaccination recipients must meet the conditions of having completed 2 doses of inactivated vaccines, and these 2 doses were administered by Sinopharm Sinopharm Beijing Company, Beijing Kexing Company, and Sinopharm Sinopharm Wuhan Company Inactivated coronavirus vaccine.

3. Two doses of inactivated vaccine must be completed in full, and the vaccination interval cannot be shorter than 6 months.

4. The vaccinated subjects have not received booster immunization, that is, they have not received the third injection. What is sequential booster immunization?

Sequential booster immunization refers to the use of vaccines with different technical routes from basic immunization for booster immunization.

Take the new coronavirus vaccine as an example. If you have previously completed two doses of the new coronavirus vaccine with an inactivated process, and then use any other non-inactivated new coronavirus vaccine to complete the subsequent booster vaccination, it is a "sequential vaccine". Strengthen immunization.”

There are currently two combination options for sequential booster immunization:

Inactivated vaccine (Vero cells) 2 doses of basic immunity recombinant protein vaccine (CHO cells) 1 dose booster Immunization;

Inactivated vaccine (Vero cells), 2 doses of basic immunity, adenovirus vector vaccine, 1 dose of booster immunity.

Source: Internet