Today is the first day of the Qingming holiday, and the anti-epidemic work in some areas is still intense. Judging from the cases announced this morning, the situation in Shanghai and Jilin is still severe.
Facing the recent Case reports, everyone will have the same questions. Why are there more and more asymptomatic infections? Why are there large differences in the proportion of asymptomatic infections in different regions?
Image source: Weibo@People Daily
Today’s hot discussion, let’s talk about the topic of asymptomatic infection of the new coronavirus. We think that under today’s epidemic, we can consider canceling the data on asymptomatic infections notified.
Coronavirus infection may indeed be asymptomatic
COVID-19, like other respiratory viruses, infects The human body does not necessarily cause discomfort afterwards. This has something to do with the virus itself and the physical condition of the infected person. The epidemic has lasted for more than two years, and the new coronavirus is also changing, from the original strain Up to now, the Omicron BA.2 variant is dominated, and the pathogenicity has been weakened. There has been an increase in asymptomatic cases after infection in humans. According to current statistics, about 1/3 of infections do not cause symptoms. Mainly infected. but not causing symptoms does not equal less contagiousness. Several studies have shown that the detected viral load (determining theThere was no quantitative correlation between high and low infectivity) and symptom severity, and viral loads were high even in asymptomatic infections. In addition, some people are only asymptomatic at the time of diagnosis of infection, and may not be symptom-free later. New coronavirus infection can be asymptomatic, especially asymptomatic cases are increasing recently, but asymptomatic does not mean there is no risk of virus transmission. The significance of counting and disclosing asymptomatic infections
Asymptomatic infections exist, but because they are also infectious, the epidemic prevention measures for asymptomatic infections will not change. What is the significance of the statistics? ? First of all, grading the symptoms of an infected person is an international Convention, the purpose is mainly for hierarchical disposal. Different medical conditions require different measures. Similar to asymptomatic, mildly symptomatic cases, the common approach is to observe, Symptomatic improvement of symptoms is the mainstay, and rapid recovery is expected, and no strong medical intervention is required. Secondly, the number of asymptomatic infections is announced The practice of conveying the true power of infection to the public during a pandemic. The public can intuitively understand the danger of the virus through the hospitalization rate, severe rate, case fatality rate, and asymptomatic infection rate of infected persons. Our current statistics disclosure needs improvement strong>
Statistics of asymptomatic infections have clinical significance and help distinguish treatment methods. It has the significance of letting the public understand the disease. However, because asymptomatic infection is also contagious, it has no significance to affect the implementation of specific epidemic prevention. When we did not fully understand the virus in the early stage of the epidemic, we established a network of asymptomatic infections. Grading, and as an important indicator for epidemic notification and evaluation of risk zoning, seems to be somewhat inappropriate today. The overly subjective evaluation criteria for “asymptomatic infections” have led to major differences in data from different places, which cannot well reflect the epidemic situation. In the “New Coronavirus Pneumonia Prevention and Control Plan”, asymptomatic infection is like this Definition: The pathogenic test of the new coronavirus is positive, without relevant clinical manifestations, such as fever, dry cough, fatigue, sore throat, decreased sense of smell (taste), diarrhea and other self-perceived or clinically identifiable symptoms and signs, and CT images Those who have no imaging features of new coronary pneumonia. How to judge whether there are relevant clinical manifestations? can be influenced by human factors. The attitude of doctors in different regions to diagnose affects whether infected people are classified as confirmed or asymptomatic infection. You can feel it, the doctor asks “What’s wrong with you” and “Are you Do you have a sore throat? If you think about it, you really don’t have it.” Is it possible to give a different answer. Consider not to miss a diagnosis, or try not to increase the diagnosis so as not to affect the risk classification , will definitely lead to a different number of completely asymptomatic infections. This is also the reason why the asymptomatic infection varies greatly from place to place, and it also indirectly leads to the increasing number of asymptomatic infections now. Too many subjective factors can Judging, if the number of asymptomatic infections is very important, it will be biased by human factors. Keep pace with the times and adjust the management of asymptomatic infections
In order to better reflect the value of the statistics of asymptomatic infections, the public should not be confused and let down their guard. We hope that statistics will be better used in the future. There is no need to separate confirmed cases and For asymptomatic infected persons, all infected persons shall be notified in a unified manner, which directly reflects the complete epidemic situation. After the local epidemic is over, the statistics of asymptomatic infections and severe infections at this stage will be summarized to give the public more accurate information on the pathogenicity of infection. The real-time statistics of asymptomatic infections are no longer As an important indicator, it reduces the pressure on front-line medical staff when making a diagnosis, turns statistics into a purely clinical scientific topic, and makes the numbers more accurate. It is also conducive to the unified arrangement and management of disease control personnel. It is an important part of concentrating efforts to exchange for victory in the fight against the epidemic at the least cost.
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