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Original title: Many cases of new corona patients recover after recovery, low level of latent virus or reinfection?
Guide: Feng Zijian said that there is not much research on the topic of Fuyang, and understanding is still very limited. More scientific research is still needed.
Author | CBN Ma Xiaohua
When the epidemic broke out in a small area across the country, news broke that patients with new coronary pneumonia recovered and regained their health from time to time.
For example, on January 24, the Weibo officer of the Beijing Xicheng District People’s Government Information Office announced that in the nucleic acid test of 1.13 million people, a person tested positive for the first time and that the person had been infected with the new crown and was Fuyang.
On the night of January 24, Shanxi Fushan also notified a “Fuyang” patient.
What are the reasons for Fuyang?
Feng Zijian, deputy director of the China Center for Disease Control and Prevention, analyzed in an interview with China Business News that there may be two situations in Fuyang:
The first is that the virus has not been eliminated from the body of the infected person and the detoxification is interrupted, after the test is negative, the test is positive again. Three to two weeks after most people are infected, the virus will clear from the body as your autoimmunity establishes itself. A small number of infected people may take longer to clear the virus from their bodies. There are also very few patients who can be infected for a long time and the virus continues to multiply in the body. This phenomenon can occur when poliovirus infects certain immunocompromised children, and this phenomenon is extremely rare in the population. The new crown may have such a rare long-term detox infection, but what is the incidence and what is the pathological mechanism is not known.
The second situation can be a reinfection. A reinfection has occurred abroad, but my country has not yet discovered it. This may be related to the fact that my country does not have a sustained epidemic and the probability of infection is low. However, even in places with large-scale epidemics, reinfection is currently a low-probability event.
The so-called “Fuyang” must meet the shock standard and the nucleic acid test returns positive after shock. China has been paying attention to the yang recovery problem after the new crown patients have recovered.
At the press conference of the Joint Prevention and Control Mechanism of the State Council on May 7, 2020, Wang Guiqiang, director of the Department of Infectious Diseases of the First Hospital of Peking University, a member of the Expert Group on Medical Treatment of Joint Prevention and Control Mechanism of the State Council, and member of the Group of Scientific and Technological Experts, said that “Fuyang” may be more appropriate to call “re-detection” for patients, which means that the virus in this patient has not actually gone, and upper respiratory tract throat swabs and nasopharyngeal swabs cannot be detected, but the lower respiratory tract still has the virus in the lungs.
The second case is that the sensitivity of the test is not strong enough. When the virus level and viral load are low, samples from the upper respiratory tract may not be found.
A doctor believes that Fuyang is actually a false proposition. The supposed cure is only the cure of the symptoms, and a very small number of patients have low levels of the virus.
At present, the National Health Commission has also issued relevant documents for the management of patients with new coronary pneumonia after recovery. The “Novel Coronavirus Pneumonia Diagnosis and Treatment Plan (Trial Sixth Edition)” requires body temperature to return to normal for more than 3 days; respiratory symptoms have improved significantly; lung images show a significant improvement in acute exudative lesions; have a negative nucleic acid test (sampling time must be at least 1 day apart); patients with mild and common types have reached discharge standards and will be isolated at home for 14 days after isolation standards are lifted.
Although strict management is carried out after discharge, according to the characteristics of the new coronavirus, discharge standards cannot fully prove that the virus is no more.
Wang Yuge, Ph.D. in immunology, told CBN that because the new coronavirus can infect many organs, especially the intestinal tract, a small number of patients can store the virus in the intestines, creating opportunities for the presence of low virus level. new coronavirus.
On February 13, 2020, the team from the Chinese Centers for Disease Control and Prevention successfully isolated two new coronaviruses from samples of confirmed cases of novel coronary pneumonia in the two provinces. This not only proves the existence of fecal-oral transmission, but it can also cause the latency of the new coronavirus in the digestive system, bringing the possibility of “rejuvenation”.
Feng Zijian said that there is not much research on the Fuyang issue and understanding is still very limited, and more scientific research is needed.
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