"The trouble of choice"!

At present, the overseas epidemic situation is still severe, and the domestic epidemic situation has been effectively controlled.

At present, my country has 4 new coronavirus vaccines that have been conditionally approved by the State Food and Drug Administration for marketing.

Which is better?

The relevant competent department of the National Health Commission stated that no matter what technical route is adopted, as long as the country has officially conditionally approved a vaccine for marketing, its safety and effectiveness are supported by certain data, and the potential or known benefits are greater than Potential risks or known risks, the public can rest assured to choose.

According to industry experts, the two technical routes of the new coronavirus vaccine have their own characteristics.

Shao Yiming, a researcher at the Chinese Center for Disease Control and a consultant to the World Health Organization's Vaccine Research and Development Committee, said that inactivated vaccines are to inactivate the new coronavirus after culture and amplification, and then inject the inactivated virus particles into the human body to induce an immune response in the human body .

According to Wang Junzhi, deputy leader of the vaccine research team of the scientific research group and academician of the Chinese Academy of Engineering, the main feature of inactivated vaccines is that the vaccine components are relatively close to the natural virus structure, and the immune response is usually relatively strong and has good safety.

The adenovirus vector vaccine is like a car carrying "new coronavirus antigen genes" cargo.

Wang Junzhi introduced that my country’s self-developed adenovirus vector vaccine adopts "type 5 adenovirus" as a carrier and introduces "new coronavirus antigen genes", which can not only induce the production of good neutralizing antibodies, but also induce and enhance cellular immunity.

So, how to choose between single needle and double needle?

Shao Yiming said that for people who need to go to the epidemic area for temporary or urgent tasks, but do not have enough time to wait, it is more suitable to inject a single-dose adenovirus vector vaccine.

In addition, the single-dose adenovirus vector vaccine has the following advantages: First, the single-dose vaccination completes the whole course of immunization, avoiding the loss of immunity caused by long distances, busy work, or lack of vaccines to get the second injection, and guarantees high The vaccination rate; second, the overall cost of a single injection is lower and the cost-effectiveness ratio is higher.

However, there are advantages and disadvantages.