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[Introduction]: Huadu District found a case of asymptomatic infection associated with overseas input. Where is the source? How did you get infected?

The source of the newly added asymptomatic infection associated with overseas input:

Male, 41 years old, native of Hunan, permanent residence in Shanghai, Shanghai province, immigration staff isolated hotel staff, daily living in the hotel staff dormitory. On October 15, when carrying out routine health monitoring for the hotel staff, Huadu District tested positive for coronavirus nucleic acid, which was transferred to Huadu District People’s Hospital for isolation and observation. On that day, Huadu district CDC tested positive for nucleic acid again, in the early morning of October 16, the provincial and municipal Centers for Disease Control and Prevention reviewed positive, which was transferred to the Eighth People’s Hospital of Shanghai for isolation treatment.

According to epidemiological investigation, when the infected person assisted some quarantine personnel in the isolation hotel to handle express delivery on October 12, he did not carry out protection according to the regulations, only wearing masks, no gloves or shoe covers, disposable protective coveralls the clothes are not standard and have close communication with the isolation personnel. On the 12th, quarantine personnel who had close contact with them were diagnosed as confirmed cases of covid-19. At present, the infected person has no symptoms such as fever and cough, and there is no abnormality in CT Examination. It has been judged by the expert group as an overseas imported asymptomatic infected person.

By 7:00 on the 17th, the dormitory and related activity venues of the infected person had been finally disinfected. 170 close contacts were identified, and the nucleic acid test results were all negative. 136 close contacts have been identified, and the nucleic acid test results are all negative. A total of 306 people have taken centralized isolation medical observation.

Traceability analysis has been completed to confirm that the source of infection is from overseas foreigners.

Today (October 18), the disease control department has completed the tracing analysis of Wang’s gene sequencing of Huadu asymptomatic infected person. From the perspective of evolutionary relationship, the viral gene sequence of Wang Mou infected with asymptomatic Huadu in Shanghai is highly homologous with the viral gene sequence of imported cases found in the isolation hotel where Wang Mou works, and the main mutation sites are completely consistent. This result is completely consistent with the previous epidemiological survey results.

Therefore, it can be absolute affirmations that Wang’s infection comes from the imported cases of isolated hotels.