On May 31, the website released a message saying that between June 10 and 30, vaccination will give priority to the second shot. This means that the first vaccination will be suspended in many places. From a national perspective, many provinces have stopped the vaccination of the first dose of vaccine, giving priority to meeting the interval of 21 days. According to the theoretical time, people who need the second dose should be vaccinated. I think there may be the following considerations. First, let those who have already received the first injection complete the second injection within the specified time. Because China&;s large-scale vaccination uses two doses of inactivated vaccine, the first needle stimulates the immune system to produce memory cells, and the second needle induces a stronger antiviral immune memory response. If the vaccination procedure is not completed according to the vaccination requirements, the best protection effect set by the vaccine will not be achieved if one of the two injections is given. Second, because of the influence of vaccine production capacity, daily vaccination number and vaccine assistance to foreign countries, it is impossible to meet the vaccination needs of all people at once under the existing conditions. According to the national news, the first shot of vaccine will be resumed after July. At present, our vaccination work is based on the needs of prevention and control, combined with the reality of vaccine supply and the vaccination work arrangement at this stage. We carry out vaccination for all kinds of people step by step according to the principles of step promotion, highlighting key points, informed consent, voluntary and free vaccination. Third, most people who are willing to take the first shot of vaccine, and still continue to waste a lot of energy and manpower to mobilize people who were waiting to see or have rejection to take the first shot of vaccine, which will only cause consequences that are not often lost. Academician said that vaccination is a very good way to realize real group immunity. China&;s vaccination rate is low, so we must keep up with the situation and strive to reach 70%-80% vaccination rate as soon as possible, just like other countries in the world. As of June 11th, all provinces and cities in China have reported a total of 863.513 million doses of vaccination. As of May 13th, a total of 366.91 million doses of vaccination were reported nationwide. It can be seen that the vaccination rate has been rapid and the number of people has increased rapidly in the past month. However, the domestic situation is not stable now, and it is rebounding at any time. Please don&;t be blindly optimistic. Only by constantly improving the vaccination rate, forming group immunity as soon as possible and occupying the &”;highland of group immunity&”; can we fundamentally control the development. Because the occurrence of large-scale depends not only on the number of resistant individuals in human or animal groups, but also on the frequency of contact between individuals in human or animal groups. Wu Zunyou, Chief Epidemiologist of CDC: According to the calculation of virus transmission coefficient, about 70%~80% people need to be vaccinated to form an immune barrier. In other words, China needs to vaccinate 1 billion to 1.1 billion people. Let&;s look at the safety rate, efficiency rate and inhibition rate of mutated virus of vaccines in China: the domestic Chinese medicine vaccine has been certified by WHO for emergency use, and the efficiency rate has been assessed as 79%. Even WHO does not recommend setting an upper age limit for Chinese medicine vaccines. Up to now, mutant viruses are roughly divided into two categories. The first category is the early mutant strains that were popular in the first half of last year. Studies have shown that these mutationsThe strain will not affect the protective effect of vaccines in China; The second category is a few that are listed in WHO&;s attention list, such as British mutant, South African mutant and Brazilian mutant. Studies have shown that Chinese inactivated vaccine and foreign mRNA vaccine still have protective effects on South African mutant, British mutant and Brazilian mutant. Again, the vaccination rate can reach 70%-80% as soon as possible, which is not only for our personal safety, but also for the security of society and the security of the country. For the wishes of those who have sacrificed in the front line of the fight against the epidemic. Don&;t wait for the virus to break through the country, and then wait in line for vaccination when panic strikes. It would be too late to make up for it. Only by installing the &”;vaccination rate&”; security door in advance can it have the function of super lock.