Zhong Nanshan mentioned herd immunity in his speech. What is herd immunity?

Herd immunity refers to the resistance of our population to infectious diseases. The premise for successful herd immunity is that at least 70 to 80 people in our population have resistance to achieve this goal, and this goal The higher the ratio, the lower the probability of infectious disease epidemic. The most effective and safe way to achieve herd immunity is vaccination. It is not advisable to rely solely on the population to acquire resistance after being infected with infectious diseases to achieve herd immunity. This is very risky.

As the novel coronavirus pneumonia epidemic spreads around the world, some countries have even experienced outbreaks. Faced with such a severe epidemic, the United Kingdom proposed a so-called herd immunity plan on March 13, planning to allow At least 60 people are infected with the new coronavirus, and their autoantibodies are used to achieve herd immunity. But judging from the test of time, not only has this goal not been achieved, but the prime minister and the crown prince have also been infected. At the same time, the number of infections and deaths in the country is still increasing. Therefore, it is necessary to infect yourself with the new coronavirus to develop immunity. The method is unreliable.

The new coronavirus is highly contagious and generally susceptible to the crowd. Most symptoms of the crowd are relieved after infection, and the prognosis is better after active treatment. However, for the elderly or those with existing chronic diseases, their own immunity is relatively low. If the infection is low, the probability of severe or critical illness after infection is greater, and the prognosis is worse. Although the symptoms of most patients are alleviated, it does not mean that the new coronavirus pneumonia is a disease that can be recovered through one's own immunity without treatment. Even for mild patients, active treatment is required before the vaccine progresses to severe or critical illness.

To achieve herd immunity, the most effective measure is vaccination. Vaccination uses a series of treatments to minimize the virulence of the virus, but at the same time retains the virus's ability to affect the human immune system. Stimulating, it can make our immune system produce antibodies, so that it can recognize and eliminate the new coronavirus after it enters the human body. At present, our country's vaccine has entered the clinical trial stage and will be put into clinical practice soon. Let us look forward to it together. Before the vaccine enters clinical practice, all we need to do is adhere to strict prevention and control and take personal protection to minimize the chance of infection and prevent the spread of the epidemic.