China has reported more than 170 million doses of COVID-19 vaccine.

Cumulatively reported more than 170 million doses of COVID-19 vaccine.

By April 13th, 2021, 31 provinces (autonomous regions and municipalities directly under the Central Government) and Xinjiang Production and Construction Corps had reported a total of 175.623 million doses of Covid-19 vaccine.

Recently, National Health Commission held a news briefing, inviting the responsible persons and experts of vaccination to popularize knowledge about vaccination in COVID-19 and answer questions from reporters.

How effective is China’s vaccine in protecting foreign mutant Covid-19? Yin Weidong, chairman of Beijing Kexing Zhongwei Biotechnology Co., Ltd., said that virus variation had been taken into account when developing vaccines. The R&D team has obtained the mutant Covid-19 strains from South Africa and Brazil. Through experiments, it is found that the vaccine in China can effectively neutralize these two strains, presumably playing a protective role.

"It is necessary to promote vaccination in COVID-19 on a large scale and form an immune barrier." Shao Yiming, a researcher at China CDC, analyzed that at present, compared with some countries, the epidemic situation in China has been effectively controlled, and the epidemic situation in COVID-19 outside China is very serious, so China is facing greater pressure to import the epidemic situation. With foreign countries, especially European and American countries, controlling the epidemic through vaccination and strengthening prevention and control, the global mobility will be released, and the risk of our people will increase greatly, because there is a huge immunization gap with foreign countries. We should grasp this window period, vaccinate on a large scale according to the order recommended by the government, and build an immune barrier, so as to effectively resist the risk of imported epidemic.

"From a scientific point of view, it is safe for the elderly to be vaccinated." Shao Yiming said that recent research has collected more and more data on the protection of vaccines for the elderly, and no problems have been found. For the elderly with basic diseases, if the disease is in the onset stage, it is best to communicate with the vaccination doctor before vaccination and follow the arrangement of the vaccination doctor. "After large-scale vaccination, some people have common side effects such as redness, induration and pain at the vaccination site, which is a normal phenomenon of vaccination." Shao Yiming said.

Yin Weidong said that National Medical Products Administration’s conditionally approved COVID-19 vaccine is allowed to be used in people over 18 years old, indicating that people over 60 years old can use it. The company has taken the elderly over 60 years old as the main object of vaccine clinical research, and the research results have been published in The Lancet. The results show that the antibody positive conversion rate of the elderly after vaccination is nearly 100%, which is almost the same as that of other people.

Wang Huaqing, chief expert of immunization program of China CDC, believes that the research shows that cancer patients have poor resistance, and the severe disease rate and mortality rate of COVID-19 are high, so they should take the lead in vaccination. However, due to the effective prevention and control of epidemic situation in China, the risk of infection of such people is extremely low. Before vaccination, whether the tumor patient is in the acute stage of onset can be judged by the vaccination doctor.

Is it necessary for ordinary people to test antibodies after vaccination with Covid-19 vaccine? Andy On, chief physician of the Center for Immunization of China CDC, said that after people are vaccinated, there is no need to do antibody testing. In the clinical trial stage of the vaccine, researchers have already done antibody tests, and only when the vaccine is effective can it pass the tests and finally go on the market. It is not necessary for ordinary people to test again. Antibody detection requires a strict laboratory environment, and ordinary people do it privately, and the results may not be accurate because they do not have the laboratory conditions. (Reporter Shen Shaotie)