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First case of highly transmissible Omicron subvariant reported in China
Published on: 2022-05-19
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China has reported the first case of Omicron subvariant BA.2.12.1, a mutation that has shown transmissibility that is about 23-27 percent higher than that of BA.2, in South China's Guangdong Province, according to a weekly report issued by the Chinese Center for Disease Control and Prevention (China CDC).
 

The patient, a 27-year-old Chinese male, arrived on international flight KQ880 from Nairobi, Kenya in Guangzhou on April 23. All passengers were transferred to a quarantine hotel for the routine 14-day medical observation after landing.
 

The patient, having received full vaccination and denying exposure to other infected cases in the previous 14 days, tested positive for COVID-19 on April 27. After diagnosis, he was transferred to Guangzhou Eighth People's Hospital for treatment.
 

On April 30, the virus sequence from the patient's nasal swab sample showed that he was infected with the Omicron subvariant BA.2.12.1. The sequence has been submitted to the National Genomics Data Center for further studies.
 

The World Health Organization (WHO) reminded countries to closely monitor the subvariant on May 4. Compared with other Omicron variants, BA.2.12.1 shows stronger resistance to immune reaction, even after individuals have had a booster dose.
 

The fast spread of the subvariant has led to the resurgence of the epidemic in many parts of the US, and cases have been reported in at least 23 countries and regions, WHO's technical lead on COVID Maria Van Kerkhov said during a Live Q&A on May 11.
 

In some parts of the US, BA.2.12.1 has already become the dominant subvariant. In the states of New York and New Jersey, the strain is responsible for 66 percent of cases, US media reported last week.
 

中国首例Omicron亚变种入侵广州

中国出现首例确诊感染新冠病毒Omicron BA.2.12.1亚型毒株的境外输入病例,这一病例是入境广州市的境外旅客。近日,广州立即部署了常态化核酸筛查工作,市民两次核酸检测间隔时间一般不超过5天,而冷链行业、在建工地人员等重点行业一天一检,超商、饭店等半密闭场所七天三检,该项工作将持续到5月底。
 

BA.2.12.1亚型毒株比其他Omicron亚变种有更强免疫逃逸能力,传播率最多快27%。
 

该名患者是27岁中国籍男子,今年4月23日从肯尼亚搭机抵达广东省广州市白云国际机场,之后与其他旅客均被转移至隔离酒店进行14天常规医学观察和常规核酸检测。该男于4月27日报告新冠病毒核酸阳性,他已经接种两剂疫苗,并且在过去14天内没有接触过其他新冠肺炎病例。确诊后,他被转至广州医科大学附属市八医院接受治疗。

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