Is it necessary to carry out antibody testing for people who have been vaccinated?

Recently, at a press conference on the Joint Prevention and Control Mechanism of the State Council, Zheng Zhongwei, the leader of the Vaccine Research and Development Team of the Joint Prevention and Joint Control Mechanism of the State Council, and the director of the Medical Science and Technology Development Research Center of the National Health Commission, said that many people are worried about vaccination.
After the new crown vaccine, the final neutralizing antibody level does not or declines, whether there is no protective effect or no protection, I hope to be able to test
.

1.
It stimulates the activation of the immune system produced by the human body , and neutralizing antibodies are not the only ones

Zheng Zhongwei said that the results of clinical trials have shown that the new coronavirus vaccine has strong immunogenicity
.

"After we were vaccinated, the antibody level gradually decreased, which is a natural response of the human immune system
.

2.
How can neutralizing antibodies be judged to be effective?

So, how can neutralizing antibodies be judged to be effective? Zheng Zhongwei introduced that to determine whether the neutralizing antibody can neutralize the new coronavirus, it is necessary to neutralize the live virus by collecting the serum of the vaccinators in the P3 laboratory, so as to determine whether the neutralizing antibody has a virus neutralizing effect
.

"In history, we have been vaccinated a lot, but this time the new coronavirus vaccine was vaccinated against the background of a global pandemic
.

He finally emphasized that to judge whether a vaccine is effective, it is mainly through the preliminary clinical trials and the later stage based on the real-world study of the large-scale epidemic, and the level of neutralizing antibodies cannot simply be used to determine whether the vaccine is effective.
, Can it be protected
.