(Fighting against New Coronary Pneumonia) "Dynamic clearing" equals "zero infection" and "city-wide lockdown"? Wu Zunyou issued a document to clarify the misunderstanding of "dynamic clearing"
China News Agency, Beijing, April 19th. Wu Zunyou, chief epidemiologist of the China Center for Disease Control and Prevention, posted a long article on social platforms on the evening of the 18th, clarifying in detail the misunderstanding of the "dynamic clearing" measure.
He believes that "dynamic clearing" does not mean "zero infection", nor does it mean that "city-wide lockdown" and "all staff nucleic acid" are necessary.
Wu Zunyou said that "dynamic clearing" does not pursue "zero infection", but to achieve the elimination of an epidemic, it also requires timely interruption of transmission in the location of the epidemic, and no new infections occur.
In other words, the country is not required to be free of new crown infections at a certain moment, but for every outbreak that occurs, it is required to be eliminated within a relatively short period of time.
He believes that "dynamic clearing" emphasizes the clearing of infected people at the social level, and does not require that there are no infected people in the location of the epidemic. This means that there are no infected people among the people who move freely in society, even if there are a certain number of people under quarantine management. It doesn't matter if the infected person is in quarantine and won't spread to the society.
Wu Zunyou said that some people equate the measures of dynamic clearing with closure and control measures. When they mention "dynamic clearing", they think of "city-wide closure and control".
The measures taken by "dynamic clearing" depend on the stage of the epidemic. If it is discovered early, it is only necessary to isolate and treat the patients, and isolate and observe the close contacts, and then clearing can be achieved.
For example, he said that in the past two years, there have been 12 new crown epidemics in Shanghai, and the maximum number of cases in each epidemic was controlled without exceeding 25 cases.
Containment and control measures are only used when the epidemic is detected late, or when it was detected early but failed to take decisive measures to control it in time, and there is more community transmission.
As for the nucleic acid testing of all staff, Wu Zunyou believes that as long as the epidemic is detected early, the transmission chain is clear, and close contacts are found along the transmission chain, there is no need to conduct nucleic acid screening for all staff.
Nucleic acid screening measures for all staff are only used when the epidemic is detected late, or when decisive measures have not been taken to control it in time, and there has been more community transmission and the transmission chain is unclear.
In addition, Wu Zunyou also explained whether the "dynamic clearing" policy affects economic development.
He said that in fact, "dynamic clearing" can escort economic construction to the greatest extent.
Wu Zunyou believes that if the epidemic is found in the first generation, controlled in the first generation, and eliminated in the first generation, it will have no impact on economic construction, but can only provide a safe environment; The second or third generation has no impact on economic development.
"If the development of the epidemic situation is relatively severe, a wider range of nucleic acid screening, closure and control measures should be taken for all employees. The 'dynamic clearing' strategy does have a certain impact on economic development." But Wu Zunyou also said that according to the mathematical model According to preliminary analysis by experts, the impact of the "dynamic zeroing" strategy on local GDP is only half of the economic impact of the non-dynamic zeroing strategy.
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