China News Service, Guangzhou, September 6 (Reporter Wang Hua) The Guangzhou Municipal Health Commission reported on the 6th that during a nucleic acid investigation of close contacts in an isolated hotel, a case of asymptomatic infection was found. The previously reported overseas imported cases belonged to the same transmission chain.

　　The case, Mr. Tang, is a cleaning staff of Donghai Building, female, 47 years old. After being screened as a close contact on September 4, she began quarantining and observation on the same day and collected nucleic acids. The result was negative.

Tang's nearly four routine nucleic acid test results before September 4 were also negative; the nucleic acid test results were positive on September 5, and he was transported to the hospital in a closed loop, where he was diagnosed as asymptomatic infection after expert consultation.

　　40 samples were smeared in the environment outside Tang's building, and the nucleic acid results were all negative.

As of 12:00 on September 6, 96 people were initially screened for close contact in Guangzhou, and all centralized quarantine measures have been implemented, and the nucleic acid test results were all negative.

388 close contacts in Suici have been investigated, and all health management measures have been implemented.

　　Zhang Zhoubin, deputy director of the Guangzhou Center for Disease Control and Prevention, said that the new asymptomatic infection of the new coronavirus nucleic acid sequencing result is also a delta mutant strain, which is highly homologous to the previously reported imported cases of Yang and Xu, the close-infected case. The epidemiological investigations belong to the same transmission chain.

　　Guangzhou has carried out a special investigation of quarantined hotels in the city to accurately define high, middle and low risk positions, strictly prevent the intersection of personnel with different risk levels, implement closed management for high-risk positions, and implement "two points and one line" for low-risk positions from home to isolated places. "Commit to work mode.

　　Chen Bin, deputy director of the Guangzhou Municipal Health Commission, said that vaccination against the new crown virus is still the most economical, effective and scientific anti-epidemic measure.

Up to now, Guangzhou City has received more than 30 million doses of vaccination.

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