Recently, the menacing Delta strain stirred the nerves of all parties.
What is the role of domestic vaccines and how effective Chinese medicine is for them have once again become a high-frequency topic of public concern.
On August 20th, the 5th China-Arab States Expo Big Health Industry Forum and the 3rd "Internet + Medical and Health" Application Conference was held in Yinchuan, Ningxia. Academicians Zhong Nanshan and Zhang Boli gave keynote speeches online and offline respectively, sharing Anti-epidemic experience, respond to current hot spots.
The overall protection rate after vaccination is 59%
"How long will the immune function decline after the vaccine is administered? According to the data of relevant countries, this time is half a year." Zhong Nanshan said.
He pointed out that most countries showed a downward trend in cases of new coronary pneumonia infections in June this year, but recently Israel, the United Kingdom, the United States, Iran and other countries have all increased. "This shows that another wave of transmission is coming."
So, how effective is the domestic virus inactivated vaccine?
"Based on our research on the outbreak of the Guangzhou new crown virus delta mutant strain in 2021, we found that the vaccine is protective: the overall protection rate is 59%, 70.2% for moderate patients, and 100% for severe patients. "Zhong Nanshan said that the latest research results have just been published in the journal "Emerging Microorganisms and Infections."
Regarding how long the validity period of the vaccine can be maintained after injection, Zhong Nanshan focused on the data of Israel, which has the highest vaccination rate in the world.
From January to April, the protective efficacy of the Pfizer vaccine used in the country reached 95%. As the vaccination rate increased, the number of new cases dropped rapidly.
However, from June to July, the protective effect of Pfizer vaccine dropped sharply to 39%, and the number of new cases increased significantly.
"This shows that the effectiveness of the vaccine decreases when the vaccine reaches a certain level." Zhong Nanshan said that at present, the whole virus inactivated vaccine or mRNA vaccine (2 doses) is injected with 1 dose of the original vaccine 6 months after injection, and all countries are practicing.
"Our country's latest practice is that after two shots of the vaccine, the antibody level dropped to a low level after 6 months, but it was found to increase significantly after the third shot."
"The latest experimental data proves that after the booster injection, the antibody level can almost increase by more than 10 times. This is a promising way to increase immunity." He said, especially for adults with booster immunization, the antibody level increased by 20 times. Above: The effect is more obvious for the elderly, which can increase by more than 30 times.
Chinese medicine has a general grasp of the entire infectious disease
Zhang Boli pointed out that Delta is a kind of wet poison. Today's Chinese medicine fights against epidemics, not only against viruses, but also with an overall grasp of the entire infectious disease. This is just a new practice.
"Traditional Chinese medicine believes that the onset of wet disease is very mild, and it can suddenly turn suddenly. At the same time, the wet disease is strange, changing, and the course of the disease is very long and difficult to cure. The occurrence of new coronary pneumonia is in line with these characteristics of the wet virus epidemic." He said.
He further explained: "After the outbreak of the Delta virus, we are very concerned about its main manifestations. Nanjing has a lot of rain, and it is wet and heavier than heat. In Wuhan, dry heat and less rain before August this year, it is heat heavier than wet. Although there are different manifestations, the main body of Delta is still damp poison."
Western medicine pays attention to viruses, while Chinese medicine pays more attention to symptoms.
Zhang Boli once mentioned this point, and this time he explained it again.
"There is a little rubbish in a house. We recruit insects. Western medicine studies insecticides. I said that our Chinese medicine doctors do not study insecticides or insects. We study rubbish. We clean up the rubbish and the house is clean. Are there any bugs?"
Zhang Boli called it the same way astray, "We have been doing this work for more than a year."
In the prevention and control of the new crown epidemic, the combination of traditional Chinese and western medicine and equal emphasis on Chinese and Western medicine are a major feature of our country.
Zhang Boli said that China bears the brunt of sharing anti-epidemic experience with countries along the “Belt and Road”. “We are a closed-book exam. After we finish the exam, we will share our experience with the world.”
Since March 25 last year, my country has organized more than 60 online conferences to introduce anti-epidemic experience to countries around the world, and at the same time it has donated medicines and dispatched medical teams, showing its international responsibility.
China’s strong control is a very important experience
"Statistics on the transmission chain show that one delta virus can transmit 4, and the second generation 4 can transmit 16. With this increase in proportion, after a few generations, it will spread in large numbers. Therefore, the current strategy is not treatment. The most important thing is to cut off. Its spread. This is a very important guiding ideology." Zhong Nanshan pointed out.
The WHO summarized the four options for preventing and controlling the new crown pneumonia epidemic in different countries, namely, strong control, suppression, containment and no effective measures.
Zhong Nanshan said that China's strong control has achieved obvious results. This is a very important experience.
He took Guangzhou’s experience in controlling the Delta virus this time as an example and expressed his approval of the measures taken by the city.
At present, the whole world is adopting the method of achieving herd immunity through vaccination. What level must China achieve to achieve "herd immunity"?
Zhong Nanshan said that this is not only related to the effectiveness of the vaccine, but also depends on the spread coefficient of the virus.
"The effective rate of vaccines in China is about 70%, and more than 80% of the entire population needs to be vaccinated to establish an effective herd immunity."
He predicts that my country's vaccination rate will probably reach over 80% by the end of this year, and achieving herd immunity in the world will require 2-3 years of global collaboration.
Zhang Boli summed up the experience of critically ill treatment in Wuhan last year and said, "Integration of traditional Chinese and western medicine has played an important role, and the rate of severe illness in my country is relatively low, which is closely related to early intervention and treatment, and has a lot to do with the later emphasis on rehabilitation."
"The complementary advantages and coordinated development of traditional Chinese medicine and Western medicine are the synergistic advantages of my country's health. I am very confident in the construction of a'healthy China'." He said.
Our reporter Wang Yingxia and intern Zhao Yuan