(Combat New Crown Pneumonia) Experts Interpret Three Changes in New Version of New Crown Pneumonia Prevention and Control Plan

China News Service, Beijing, March 8th: Experts explain three major changes in the new version of the new crown pneumonia prevention and control plan

Author Huang Yuqin Zhang Ziyang Ma Haiyan

The National Health and Health Commission of China released the new Coronavirus Pneumonia Prevention and Control Program (sixth edition) on the 7th. A number of medical experts said in an interview with a reporter from China News Agency that compared with the fifth version of the plan released two weeks ago, the new version of the prevention and control plan proposed for the first time to prevent the import of foreign cases, and added serological testing as one of the evidence on the standard of confirmed cases , And clearly strengthen the technical guidance role of China CDC.

The first to prevent the import of overseas cases

The World Health Organization issued a statement on the 7th that the number of newly diagnosed cases of new pneumonia worldwide has exceeded 100,000, and all countries should take strong containment measures to slow down and reverse the spread of the epidemic.

Faced with the spread of the epidemic worldwide, the National Health Commission of China mentioned in the latest version of its diagnosis and treatment plan and prevention and control plan the need to prevent imported imported cases.

As for how to detect and prevent imported cases, Zeng Guang, chief scientist of epidemiology at the Chinese Center for Disease Control and Prevention, told reporters from China News Agency that it is necessary to understand not only the epidemic of foreign epidemics, but also the relationship between the country and Chinese personnel. The situation, from the entry and exit quarantine of the customs, began to pay attention to, according to the severity is divided into high, medium and low risk, and take different measures.

The prevention and control plan issued by the Chinese National Health Commission on the 7th proposes to adjust the epidemiological history of cases in the definition of surveillance and increase the travel or residence history of countries and regions with severe epidemics. In the case detection approach, measures such as port health quarantine are added.

In key places, institutions, and crowd prevention and control, the latest version of the plan adds port quarantine and health management to people who come to China (return), and requires that key personnel such as suspected cases, confirmed cases, and close contacts be checked. , Medical treatment and medical observation, to prevent the spread of epidemic situation across borders.

Increase serum testing as a criterion

The new version of the National Health and Health Commission's new diagnosis and treatment plan released on the 4th added serological tests on the basis of pathogenic examination. The new version of its prevention and control plan released on the 7th adhered to the same principle, supplementing serological evidence as one of the diagnostic criteria: serum new coronavirus-specific IgM antibodies and IgG antibodies were positive; serum new coronavirus-specific IgG antibodies were changed from negative to Positive or recovery period was 4 times and more than that of acute period.

In addition, the sixth edition of the prevention and control program added a positive serum specific IgM test as an optional criterion in the definition of asymptomatic infection.

During the epidemic, the problem of "false negatives" in nucleic acid reagent testing has plagued frontline medical staff and caused a risk that cannot be ignored. Many experts pointed out that including serological test results in the diagnostic criteria is undoubtedly a powerful measure to avoid related risks.

"Serum antibody testing has also been used in the diagnosis of SARS in the past." Tong Zhaohui, a member of the central expert group of the Hubei steering group and deputy director of Beijing Chaoyang Hospital, said that the production of disease antibodies may take 3 to 5 days. The detection is lagging, but the reliability is better than nucleic acid detection, so it can be used as a "double insurance" for diagnosis.

He specifically pointed out that if the nucleic acid test is negative for both suspected cases and the serological test is also negative, the suspected cases can be better excluded.

Strengthening the technical guidance role of the China Centers for Disease Control and Prevention

The National Health Commission of China specifically proposed in the new version of the prevention and control plan to strengthen the technical guidance role of the China Centers for Disease Control and Prevention. The guidelines, specific site disinfection technology guidelines, and specific population personal protection guidelines are uniformly formulated by the Chinese Centers for Disease Control and Prevention, and require the Chinese Centers for Disease Control and Prevention to strengthen technical guidance for national prevention and control work. "

In response, Feng Zijian, deputy director of the China Centers for Disease Control and Prevention, told reporters that the specific schemes mentioned in the document are highly technical. As a disease prevention and technical institution, the China Centers for Disease Control and Prevention issues appropriate technical guidelines that are appropriate and consistent with its own technical functions .

"In the past, these plans were formulated by the National Health and Medical Commission's CDC and the CDC." Feng Zijian said that now letting the CDC develop and issue specific technical guidelines in accordance with the principles of the overall plan can be regarded as "simplified procedures."

The sixth edition of the New Crown Pneumonia Prevention and Control Plan states that the Chinese Center for Disease Control and Prevention should strengthen technical guidance for national prevention and control work. In Feng Zijian's view, this means that the CDC's responsibility for technical guidance on prevention and control has been further strengthened. "Technical matters really should be done by professional and technical institutions."

However, Feng Zijian also said that although China CDC will issue a new national prevention and control technology plan and guide, localities should put forward guiding principles based on the national plan to further refine and formulate specific work plans suitable for local special circumstances. (Finish)