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Written by: Li Enci
2021-06-05 19:32
Last update date: 2021-06-05 21:17
The Centre for Health Protection announced today (5th) that a 17-year-old girl living in Shing Yu Court, Tin Shing Court, Tin Shui Wai, was diagnosed with a British variant virus strain (N501Y Alpha) with a CT value of about 18.
His mother was also initially diagnosed, with a CT value ranging from 16 to 19, and the two had been to Yuen Long, Tuen Mun and Tai Po.
Associate Professor Xiao Jieheng of the Department of Medical Technology and Informatics of PolyU said that the amount of virus in girls is 1,000 times higher than that of patients with the variant virus group in South Africa earlier, and they are highly infectious.
The urgent task now is to find the source of the infection of the girls and mothers and plug the loopholes in the epidemic as soon as possible.
He urged the Health Protection Center to obtain the genetic sequencing of confirmed cases of local epidemics from the health departments in surrounding areas, such as the Shenzhen Health and Health Commission, in order to find the confirmed cases with the most similar virus genes.
▼6.4 A 17-year-old female resident of Shengyu Pavilion, Tianshengyuan, was infected with the disease▼
Ten mutations different from recent popular genes
Associate Professor Xiao Jiehang of the Department of Medical Technology and Information Sciences of PolyU said that the team obtained test samples of young girls from Tuen Mun Hospital and the temporary hospital yesterday afternoon. After sorting, they were found to be a British variant virus strain (N501Y Alpha).
He said that the previous cases of the variant virus in Hong Kong were limited to imported cases. This was the first local case of unknown origin, and everyone worried about the situation.
The PolyU and HKU teams compared the case analyzed earlier and found that the virus gene of this case differed by 10 mutations from the closest case. "The case that has been more than half a year apart first got 7 mutations, so this time it should be irrelevant. It seems to be caused by an existing imported case", so there is no way to find her source immediately.
He is sure that Hong Kong has "leaked" the imported cases, but he does not know how many generations it has spread in the community.
"Surprise" cases are 50 to 70% contagious
Xiao Jieheng described this British variant virus case as a "sudden attack", and its infectivity was 50% to 70% higher than that of ordinary virus strains.
The girl’s CT value is 17.6, that is, the virus load is high, 1,000 times higher than the earlier spread of Indian businessmen and the South African variant virus group, which is very contagious.
The amount of the girl’s virus was at least 1,000 times higher than that of the South African mutant virus at that time, which means it is highly infectious.
Associate Professor Hsiao Kit Hang, Department of Medical Technology and Informatics, PolyU
Girls and their mothers have been to different places in Hong Kong. It is now at a time when the community is relaxing the epidemic prevention measures. In addition, the vaccination rate of Hong Kong people is not high, which can have a serious impact on the community. The case is the second warning sign, which is the first sign of the fifth wave of the epidemic.
Xiao Jieheng expects that more close contacts of the girl and her mother will be diagnosed, but hopes that the group will not expand further.
▼6.4 Detection of the closed area of Shengyu Pavilion of Tianshengyuan▼
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Xiao Jieheng emphasized that the most urgent task now is to find the source of the infection of girls and mothers, and plug the loopholes in the epidemic as soon as possible, otherwise it may lead to more cases of mutant viruses in the community.
The British variant is the most common virus strain in the world, accounting for more than half of the cases. "It is found in neighboring places, Taiwan, and the mainland."
The British variant virus now calls for investigation in the Mainland
Recently, several cases of the British variant virus in Yantian, Shenzhen have attracted public attention to the hidden concerns of the "Easy Return to Hong Kong" project. Xiao Jieheng said, "It is necessary to compare the degree of genetic similarity of the (virus), and we can first determine whether the case is related to the mime." He urged health protection The center asks the health departments in the surrounding areas, such as the Shenzhen Health Commission, etc., to obtain the genetic sequencing of confirmed cases of local epidemics, in order to find the confirmed cases with the most similar virus genes.
When asked whether the "Easy-to-Hong Kong" program should be expanded to high-risk areas, Xiao Jie Heng pointed out that from a health perspective, tightening measures is the safest approach, but in fact it must be balanced with convenience.
▼The infected girl visited Derong Industrial Building on June 5 to arrange cleaning ▼
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