How long is the protection period of the new coronavirus vaccine? What’s the difference between the five new vaccines in China? Here comes the expert’s answer

How long is the protection period of the new coronavirus vaccine? Is the protection period only half a year? What if the new coronavirus mutates? CDC expert response: after half a year of protection period, the vaccine will still have a certain effect, and the vaccine still has a certain protective effect on the existing mutant strains

.

01 how long is the protection period of new coronavirus vaccine? Shao Yiming, a researcher of China Center for Disease Control and prevention, said that the so-called half year protection period only means that neutralizing antibodies of some people will decrease after half a year

.

These people have low neutralizing antibodies

.

If they are infected by the virus, a large number of memory cells will be awakened and produce immunity

.

“It’s different from the immunity of people who have never been vaccinated.” Feng Zijian, deputy director and researcher of the Chinese Center for Disease Control and prevention, said that at present, our data on the protection period and persistence of the vaccine are not sufficient, because it takes about half a year from the vaccine experiment to the market, and it is not long for us to observe

.

“From the current data, the protection time of vaccines on the market in China can be at least half a year

.

Will it be longer? This needs further observation

.

” 02 new coronavirus mutation how to do? In response to the mutated virus, Shao Yiming said that the existing mutated strain can only partially reduce the protection efficiency of the vaccine

.

“The reduction in protection efficiency we see is generally for mild cases, but the protection efficiency for severe cases is still relatively high.” Shao Yiming introduced that after inoculating with the new coronavirus vaccine, the basic immunity to the new coronavirus will be established for the vaccinator

.

If one day the virus mutates beyond the existing control range of the vaccine, the previous injection will not be in vain

.

According to Yin Weidong, chairman of Beijing Kexing Zhongwei Biological Technology Co., Ltd., the company has started vaccine research on the mutant strain

.

Yin Weidong said that in the future, if the virus mutation accelerates to a certain extent, one possibility is to add the antigen composition of a mutant strain on the basis of the existing vaccine to become a bivalent vaccine; the other possibility is to inject a booster injection against the new mutant strain after two injections of the current vaccine

.

“In the past year, the R & D approval process of new coronavirus vaccine in China has been basically straightened out

.

Compared with the previous ones, the R & D cycle for mutant strains will be shorter and the efficiency will be higher.” Yin Weidong said

.

Novel coronavirus pneumonia epidemic is not yet beyond the controllable range, Shao Yiming and other industry experts call for

.

The vaccine should be vaccinated as soon as possible to build a stronger colony immune barrier, and at the same time, it can reduce the speed of virus mutation and finally stop the epidemic as early as possible

.

For more information about the new coronavirus vaccine, please refer to Xinhua news agency, Xinhuanet and Shen Lin, editor of Zhejiang news client.

.