Wu Zunyou: Only countries that have achieved herd immunity by vaccination may open the "national door"

　　On April 15, at the "New Development Pattern and the Big Trend of the Fourteenth Five-Year Plan-2021 Xinjing Think Tank Spring Summit", Wu Zunyou, chief epidemiology expert of the Chinese Center for Disease Control and Prevention, said that the country is now vigorously promoting vaccination. If you have not been vaccinated, go to vaccinate as soon as possible.

We must increase the vaccination rate before autumn and winter, because "whoever achieves herd immunity first will be able to open the country first."

　　Epidemic prevention and control still cannot be taken lightly

　　Wu Zunyou said, judging from the epidemic trend of several countries with high epidemics in the world, the prevention and control of the new crown epidemic is difficult, complicated, and repeatable and long-term.

We must be psychologically prepared for the long-term fight against the new crown pneumonia, and we must persist in implementing prevention and control measures in place, and implementing various measures in detail, so that the epidemic can be controlled.

　　Globally, the peak of the new crown epidemic has passed. It is difficult to exceed the record of 800,000 new confirmed cases in a single day in the world at the end of last year and early this year, but it is still in the high epidemic stage.

Although the vaccine has already been applied, it has brought hope to the world to control the epidemic, but before the arrival of the winter of 2021, the world will not be able to achieve the immunization rate required by the herd immune barrier.

　　As far as the country is concerned, there has not been a large-scale spread of the epidemic, and the travel of the whole society is safe.

"After four quarters of tests in spring, summer, autumn and winter, it should be said that my country has accumulated a complete set of experience in responding to the new crown epidemic, which can be detected in time and controlled in time, and there will be no large-scale outbreaks. Please relax the public on this point," said Wu Zunyou .

　　Transmission of asymptomatic infections is a big challenge for epidemic prevention and control

　　Wu Zunyou said that the potential transmission risk of asymptomatic infections still deserves great attention.

For example, in December last year, an examinee in Beijing went on a business trip outside of the country after completing a nucleic acid test, and the nucleic acid test turned out to be positive.

As an asymptomatic infection, transmission may occur during travel, but if we all wear masks, the possibility of transmission will be greatly reduced.

　　From the epidemic prevention and control work in Beijing, Kashgar, Xinjiang and other places, it has been found that among the diagnosed cases, the proportion of asymptomatic infections has indeed increased.

For example, during the Kashgar epidemic, 80% of diagnosed cases were asymptomatic infections.

Is this because the expansion of nucleic acid testing can detect asymptomatic cases in time?

This may be one of the reasons.

　　At the same time, the mutation of the new coronavirus has also brought new challenges.

According to reports, after the virus mutation was discovered in the UK, newly infected cases were more severely ill than previously infected cases, and the death rate of newly infected people has also increased.

"The current domestic observation is the situation of early foreign importers. In the United Kingdom, has the mutated virus spread to other countries in the world? If this is the case, the development trend of the new crown epidemic may appear more unpredictable. However, the continuous decline of the epidemic in the UK has strengthened the world's confidence in defeating the epidemic," said Wu Zunyou.

　　Raise my country's vaccination rate before autumn and winter

　　"Many people are concerned about whether there will be transmissions caused by similar imported cases of new crowns", Wu Zunyou said, there will definitely be.

As long as the overseas epidemic is not controlled, there will always be, but there will be no major rebound.

Because there are more and more methods of epidemic prevention and control, and more and more experience.

For example, Beijing Xinfadi, Shanghai and other epidemic prevention and control work have been done very well, and the epidemic has been controlled within a very small range in a short period of time.

　　Wu Zunyou explained that at the moment when vaccination is rapidly spreading around the world, whether inactivated vaccines, adenovirus vector vaccines and mRNA vaccines have similar preventive effects, this is the most important means for mankind to defeat the new coronavirus.

In the absence of a vaccine, the world faced the first round of COVID-19 battle. my country adopted the strategy of "containment" and became the winner.

Under the new situation with vaccines, European and American countries are driven by the two-round strategy of "natural infection" + "vaccination", and they will develop overall immunity faster than China.

　　"Because of my country's large population, the number of people vaccinated to achieve herd immunity is about 1 billion," Wu Zunyou called on. Now the country is vigorously promoting vaccination. If those who have not been vaccinated, get vaccinated as soon as possible.

We must increase the vaccination rate before autumn and winter. Whoever achieves the vaccination rate to herd immunity will be able to open the country first.

Therefore, the public must work together to vaccinate as soon as possible to achieve the vaccination coverage required for herd immunity.

　　Beijing News reporter Xiao Longping