Chinanews Client Beijing, March 28 (Reporter Zhang Ni) According to data from the National Health Commission, as of March 27, the cumulative number of vaccinations against the new coronavirus has exceeded 100 million doses.

　　The vaccinated population continues to expand. How long are we to build the largest immune barrier?

Data map: Medical staff are preparing vaccines.

Photo by China News Agency reporter Hou Yu

Over 100 million doses of new crown vaccine have been vaccinated in various places

　　On December 15, 2020, China officially launched the vaccination of key populations. For more than three months, the vaccination situation of the new crown vaccine has attracted much attention.

　　The National Health Commission previously disclosed that China is currently organizing and implementing vaccination in accordance with the principle of sequential advancement of key populations, high-risk populations and other populations, and steadily increasing the population coverage of the new coronavirus vaccine.

　　The latest data shows that as of March 27, 2021, a total of 10.417 million doses of new coronavirus vaccines have been reported in various regions.

　　In addition, the official has made it clear that vaccine research and development units are also accelerating research and development. After clinical trials have obtained sufficient safety and effectiveness data, they will carry out large-scale vaccination of the elderly over 60 years old.

At present, Beijing, Wuhan, Hubei, Hefei, Anhui and other places have successively launched new crown vaccination for people over 60 years old.

On March 26, teachers and students of Shanxi Taiyuan City University received the new crown virus vaccine at a designated place on the campus.

Photo by China News Agency reporter Wu Junjie

80% of people can be vaccinated to achieve a herd immune barrier

　　Vaccination of the new crown vaccine can effectively protect individuals and the population, reducing the infection rate, severe illness rate and mortality rate.

　　So, how many people need to be vaccinated in order to build a herd immunity barrier?

　　Shao Yiming, a researcher at the Chinese Center for Disease Control and Prevention, told the media recently that the current vaccine prevention is secondary prevention, mainly to prevent disease, especially to prevent severe illnesses that require medical treatment and ICU severe illness.

　　Experts emphasized that 80% of the population can be vaccinated to achieve the herd immunity barrier, that is, more than 1 billion people must be vaccinated.

　　Shao Yiming said that China's daily vaccination capacity is now the highest in the world, reaching 10 million people. If 1 billion people are vaccinated, it will be 100 days.

　　In fact, some areas have initially established immune barriers.

　　For example, as of 9:50 a.m. on March 27, a total of 808,000 people had been vaccinated against the new crown in Daxing District, Beijing, of which 461,000 were vaccinated in two complete doses, 47,200 were vaccinated for elderly people over 60, and the cumulative doses were 1.269 million. The vaccination coverage rate reached 80% in the city, and the new crown immune barrier in this area was initially established.

　　"When we most need vaccines to play the role of herd immunity, it is when the global prevention and control situation improves. Most countries around the world have achieved herd immunity level in vaccination, then the country opens, and global personnel exchanges increase. I think it may be at least 6 months to 10 months. It's a month later, so we have enough time to build the largest immune barrier." Shao Yiming said.

On March 25, at the Zall Gymnasium of Wuhan University, students lined up in an orderly manner to receive the new crown vaccine.

Photo by Li Han

The daily output is increased to about 5 million doses and the supply is guaranteed

　　At present, 5 vaccines in China have been approved for conditional marketing or emergency use, including 3 inactivated vaccines, 1 adenovirus vector vaccine, and 1 recombinant protein vaccine.

　　Whether the production of vaccines can keep up with large-scale vaccination is also a question of the most concern to the public.

　　"These companies are currently racing against time, organizing production at full capacity 24 hours a day, and other technical routes of vaccines will be launched in succession with the progress of research and development, and the production capacity of these vaccines is basically ready. Once the products are approved, It will start production, market supply, and provide you with more choices." Mao Junfeng, deputy director of the Consumer Goods Industry Department of the Ministry of Industry and Information Technology, revealed at a recent press conference on the joint prevention and control mechanism of the State Council.

　　In addition, data from the Ministry of Industry and Information Technology show that the current daily output of vaccines in my country has increased from 1.5 million doses on February 1 to the current 5 million doses, with a cumulative supply of more than 100 million doses in the country.

According to the existing production arrangements, we are fully confident to meet the inoculation needs at all stages.

Data map: Outside the vaccination area, citizens lined up for vaccination.

Photo by Yu Jing

Who can't get the vaccine yet?

　　The vaccine is a foreign antigen to the human body, and some adverse reactions may occur after vaccination.

The adverse reactions currently monitored mainly include local and systemic reactions.

　　Local adverse reactions include pain, redness, swelling, and induration, which do not require treatment and will heal on their own; systemic adverse reactions include headache, fatigue, and low-grade fever.

　　Most allergies are acute allergies, and the proportion that occurs within 30 minutes after vaccination is very large. One of the purposes of observing the scene for 30 minutes is to prevent other injuries caused by acute allergies.

　　So, who are not suitable for vaccination at this stage?

　　People who are not suitable for vaccination include pregnant women, breast-feeding women, people who are in the acute phase of fever, infection and other diseases, people suffering from immunodeficiency or immune disorders, severe liver and kidney diseases, drug-uncontrollable hypertension, diabetic complications, and malignant diseases. Tumor patients and other personnel.

　　Therefore, when vaccinating, it is necessary to truthfully inform the doctor about the health status, past medical history, allergy history and other information, including the history of chronic diseases, so that the doctor can make a comprehensive evaluation to determine whether it is suitable for vaccination.

　　In addition, some experts reminded that the Ching Ming Festival holiday is coming soon, and many people have already made travel plans.

Before the vaccination of the population in our country reaches a high level of immunity, everyone's awareness of prevention and control and prevention and control measures cannot be relaxed, regardless of whether they are vaccinated.

In places where people gather, it is still necessary to continue to wear masks, perform personal hygiene, and follow the requirements of local prevention and control measures.

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