On the morning of August 20th, Zhong Nanshan , academician of the Chinese Academy of Engineering , delivered a video speech at the 5th China-Arab States Expo Big Health Industry Forum and the 3rd "Internet + Medical Health" Application Conference.
academician Zhong Nanshan said that research on the previous Guangzhou epidemic showed that the overall protection rate of the domestic inactivated vaccine against the Delta strain was close to 60%, and the critical illness protection rate was 100%
Currently, 9 vaccines in mainland China have been conditionally marketed or used urgently
7.
Regarding the current concern about Delta strains, Zhong Nanshan said that current laboratory studies have shown that domestic vaccines such as Kexing have a reduced protective effect on Delta strains, but they are still "very effective
In the recent Guangzhou epidemic, a total of 153 people were infected with the Delta strain
How long after vaccination, the immune function will decline? Zhong Nanshan listed relevant information about Israel and the United States respectively
The number of confirmed cases in the United States also rebounded in August
"Inactivated vaccines or mRNA vaccines, half a year after vaccination, the immune function has been significantly reduced
According to the latest domestic research data, if another dose is given 6 months after the second dose of vaccine, the antibody level has increased significantly by more than 10 times, and it will remain at a relatively high level 6 months after vaccination
"It seems that this is a very promising method of boosting immunity
What level of vaccination does China need to achieve to achieve "herd immunity"? Zhong Nanshan said that this is related to the effectiveness of the vaccine and also depends on the spread of the virus
Focus on the new crown pneumonia epidemic
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