This article is reproduced from [Beijing Daily Client];
On February 26, the Joint Prevention and Control Mechanism of the State Council held a press conference to introduce the situation of epidemic prevention and control and vaccination. At the meeting, Wang Huaqing, chief expert of the immunization program of the Chinese Center for Disease Control and Prevention, introduced that sequential immunization is a vaccine that adopts different technical routes. A vaccination strategy adopted to further reduce the risk of serious adverse reactions.
In the past, vaccinations, especially for children, were mostly of the same type. The vaccine completes the entire immunization. Of course, there are also some cases of sequential immunization, such as children receiving polio vaccine. In the past, we used live attenuated vaccines for 4 doses in the whole process. Later, with the availability of vaccine supply, especially the availability of new products, Now a sequential immunization program is adopted, including the first two doses of inactivated vaccine, the last two doses of live attenuated vaccine, and two vaccines with different technical routes are reflected in one child vaccination program, which belongs to Sequential immunization.
We know that the new crown virus is changing, how to improve the effectiveness of the existing new crown vaccine? The World Health Organization has relevant recommendations, and our country is also considering it, so a sequential immunization procedure has been proposed. As for the “mixed fight” you just mentioned, this may be a concept put forward by the public or the common people. Professionally speaking, it is actually a vaccine with the same technical route, but the manufacturers are different. This time, the inactivated vaccine is issued to one manufacturer, and the second The second and third times to hit another manufacturer, in fact, are all inactivated vaccines, all of which are the same technical route, not sequential immunization.