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Original title: 1 case of imported asymptomatic infection in Chengdu attracted the attention of experts: low viral load, current close contacts are negative
According to the official WeChat account of Health Sichuan, on November 14, Chengdu reported a case of asymptomatic infection imported from abroad, which raised great concern among netizens. To this end, Zhou Jiushun, deputy director and chief physician of the Sichuan Provincial Center for Disease Control and Prevention, answered relevant questions.
On November 14, the city of Chengdu reported a case of imported asymptomatic infection, a 26-year-old man who left Kenya on flight KQ882 on October 16, arrived in Guangzhou on October 17 and was quarantined locally after the entrance. The quarantine period expired on the 31st and the quarantine was lifted after a negative nucleic acid test. On the same day, I took flight HU7351 to Chengdu and took a special car to stay at the Jinjiang hotel to isolate myself.
On November 14, the quarantine period expired and the nucleic acid test was carried out again, the result was positive and he was immediately transferred to a designated hospital for isolation and treatment.
The infected person has no symptoms such as fever, cough, diarrhea, the CT results are normal, and the serum antibody test is negative for IgM and weakly positive for IgG. You are diagnosed with an asymptomatic infection.
After the outbreak, the provinces and municipalities promptly activated emergency plans to carry out a comprehensive management of the epidemic from the management of infected people, epidemiological investigations, nucleic acid tests and environmental disposal. In accordance with the requirements of the “Program for the Prevention and Control of Pneumonia by New Coronavirus (Seventh Edition)” of the National Health Commission, close contacts and other contacts of the asymptomatic infection were carried out to carry out tracking management and nucleic acid tests.
At 8:00 AM on November 16, a total of 1,476 individuals were investigated and sampled, including 62 close contacts, 1,414 other contacts, hotel staff, and internal passengers; 13 samples were taken from the external environment and the test results were all negative. All relevant close contacts have been quarantined. Comprehensive environmental disinfection was carried out in places where infected people may be contaminated.
According to national standards for diagnosis and treatment and prevention and control, combined with the results of epidemiological investigation and laboratory tests of the infected person, the experts concluded that: the asymptomatic infected person was infected abroad, with low viral load, and has produced protection against the new coronavirus. Sex-neutralizing antibodies, current close contacts, researchers, and external environment test results are all negative, and the risk of further spread or cluster epidemics is low.
Today autumn and winter have entered and the international epidemic situation is still very serious, sporadic cases have appeared in many parts of China. Based on current knowledge of the new disease coronary pneumonia, spread is primarily through short-range droplets. In addition, you can also become infected by contact with items contaminated by the virus. Aerosol transmission can also occur in confined spaces for a long time.
Experts suggest that everyone should attach great importance to the prevention and control of infectious respiratory diseases such as the new crown, maintain personal protection awareness at all times, develop a mask to carry with you, and scientifically standardize the use of masks (especially when take public transportation and activities in public places). Wash your hands frequently, ventilate frequently, and maintain a social distance of 1 meter.
If symptoms such as fever, cough, fatigue, etc. occur, you should wear a mask, go to the nearest medical institution fever clinic for investigation and treatment in time, and try to avoid taking public transportation during treatment doctor.
