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Original title: Many local epidemic sources were found throughout the country, all asymptomatic.
On January 28, the Jilin Province People’s Prosecutor’s Office issued a notification that on January 12, 2021, a new corona pneumonia epidemic broke out in Tonghua City, Jilin Province. After investigation, the epidemic was caused by “Yuansheng Quality of Life Plaza” in Xinzhan Street, Dongchang District, Tonghua City. “The operator Ji Moumou hired Lin Moumou of Heilongjiang nationality (the person has an asymptomatic infection of a new coronary pneumonia, the epidemic of Tonghua City” Infection Source No. 0 “) to Dongchang District, Tonghua City on January 9, 2021. Caused by sales promotion. On January 17, 2021, the Dongchang District Office of the Tonghua City Public Security Bureau launched an investigation for the crime of obstruction of prevention and control of infectious diseases.
According to the latest report from the Tonghua Health Commission on January 28, at 24:00 on January 27, the city of Tonghua had reported a total of 211 confirmed cases of the imported epidemic and 81 cases of asymptomatic infections.
A reporter for the Health Times found that the source of infection in many of the previous epidemics in my country was an asymptomatic infection.
Outside the gate of the Yuansheng Quality Health Center in Tonghua City, several staff members from the disease control department are working, Image according to Xinhua News Agency
The source of infection in Shunyi, Beijing was an imported asymptomatic infection
On December 30, 2020, Pang Xinghuo, deputy director of the Beijing Center for Disease Control and Prevention, presented the new corona pneumonia epidemic in Beijing at the press conference. After gene sequencing and flow analysis, it was initially determined that the source of infection was added again in the December 26 report. 1 case of asymptomatic infection imported from abroad (case 1).
Case 1 is a 28-year-old man, an Indonesian citizen, living in Indonesia for a long time. It came in from Indonesia on November 26, 2020. It was a close contact with a seat on the same flight and a row from an imported case. reported from Fujian province. After 14 days of isolation in Fujian and a negative nucleic acid test, he arrived in Beijing on December 10, where he lived in Shunyi District. On December 26, the nucleic acid detection of the new coronavirus was negative and the serum IgM antibody was positive; On December 27, the nucleic acid of the new coronavirus was detected in the environment of his residence and workplace, and he was transferred from negative 120. pressure ambulance to Ditan Hospital; December 28 The nucleic acid test of the new coronavirus was positive on the day, combined with the results of the epidemiological history, clinical manifestations, laboratory tests and imaging tests, the patient was diagnosed as asymptomatic infection the same day.
Evidence from field research suggests that the local clustered epidemic in Shunyi district is a single chain of transmission. Case 1 was the origin of the clustered epidemic, which was transmitted to the tenants of the shared house after arriving in Beijing, Case 2, and also to the employees of a supermarket in Shunyi during the shopping period. Subsequently, many infected cases infected many people, causing the epidemic to spread.
The “source of infection” at Qingdao Chest Hospital is from an asymptomatic infection
Just after the 2020 National Day Mid-Autumn Festival holiday, a new corona epidemic appeared in Qingdao, Shandong.
On October 16, 2020, it was announced at the Qingdao City epidemic prevention and control press conference that the joint national and provincial expert team determined that the new corona epidemic in Qingdao was a cluster epidemic in hospitals. . The possibility of community transmission and the source of Infection ruled out Two asymptomatic Dagang infections were a clustered epidemic caused by two infected people sharing a CT room with common patients, and there was no community transmission.
The chain of infection consists of two asymptomatic infected persons who were isolated in the chest hospital for examination in the CT room. Due to non-standard protection and disinfection, the CT room became contaminated with viruses, which infected specialist patient Li Moumou who came to the CT room for examination the next morning and escort Liu XX.
Currently, only tests can find asymptomatic infections
Regarding “asymptomatic infection becomes a source of infection”, the “Plan for the Diagnosis and Treatment of Pneumonia due to New Coronavirus Infection (Eighth Edition Trial)” issued by the National Health Commission clearly stated that “the source of infection are mainly the patients and patients infected by the new coronavirus. People who are asymptomatically infected are infectious during the incubation period and become most infectious within 5 days of illness onset. “
Wang Guiqiang, a member of the expert team of the National Health Commission and director of the Department of Infectious Diseases of the First Hospital of Peking University, presented at a meeting of the State Information Office on April 27, 2020 that the problem The most important of the asymptomatic infections is actually infectious. We believe that its contagiousness is clear, and it is treated the same as ordinary patients and it is contagious. The infectivity during the incubation period is relatively stronger, while the viral load of asymptomatic infections is generally lower, but this is only a relative number and does not represent the relationship between infectivity and non-infectivity, thus for asymptomatic infections some of them can become infected during the incubation period and eventually become patients, so isolation and observation are very important.
Wang Guiqiang said that only through tests can asymptomatic infections be found. So my country is now very clear, emphasizing large-scale nucleic acid testing, hoping to detect these asymptomatic infections as soon as possible. At present, we carry out routine inspections when we return to China from abroad, and it is precisely this routine inspection that has found many asymptomatic infections. We also carry out general screenings for the general population and high-risk groups, with the aim of finding these asymptomatic infections, isolating and observing them in time, and avoiding further spread.
Wang Hufeng, a professor at the Renmin University School of Public Administration of China, once said in an interview with the Health Times that for asymptomatic infections, a case of rapid response and isolation and control of the extent of transmission may have a preventive effect. . The best way to prevent asymptomatic infections on a daily basis is to take protective measures, wear a mask, maintain social distancing, and wash your hands frequently when you return home. At the same time, for people who are eligible to receive the new corona vaccine, active vaccination of the new corona vaccine can also greatly reduce the likelihood of infection. (Compiled by Lu Yang)
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Editor in charge: He Zhongfu
