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Written by: Kong Fanxu and Wang Jieen
2021-01-25 15:03
The last update date: 2021-01-25 15:05
The new crown pneumonia epidemic in Hong Kong continues. Recently, 9 residents in Block 5 of Laguna City, Lantian have been diagnosed. Government expert consultants, Professor Yuan Guoyong of the Department of Microbiology of the University of Hong Kong, Director Huang Jiaqing of the Centre for Health Protection and the Environmental Protection Department went upstairs to inspect this morning (25th) .
Yuan Guoyong said that 10 residents in Block 5 have been diagnosed temporarily, and 2 security guards have been infected with the disease. One of them lives on the new reclaimed street in Yau Ma Tei. Vertical transmission is suspected in Unit E on the 15th to 17th floors, and the chimney effect or disturbance is not ruled out. Because of the flow effect, residents of Unit E in the building have to evacuate.
Yuan also mentioned that the building had already undergone compulsory testing, but it was estimated that about 200 to 300 people did not participate, accounting for 30 to 40% of the residents.
On January 25, government expert consultant Yuan Guoyong, chair professor of the Department of Microbiology of the University of Hong Kong, visited 5 buildings in Laguna City where the epidemic occurred.
(Photo by Zheng Zifeng)
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At the beginning of 16E, there was a family gathering at the beginning of the month of 4 people suspected of being infected
After the inspection, Yuan Guoyong pointed out that there were people diagnosed on multiple floors of the 5 buildings in Laguna City, including 4 in 16E, 1 in 15E, 1 in 17E, 1 in 19F, and 3 in 26D.
He pointed out that there are two possibilities for the outbreak of the epidemic. Among them, there was a family gathering on the 9th of this month in 16E. One of the non-household participants was later diagnosed, which may infect the whole family; the other 5 have been diagnosed by two security guards, one of them It is a residential reclaimed street, and it may spread through shared spaces.
The location of the kitchen drain is changed to the servant's room with
U-shaped partition without water
Yuan Xu pointed out that there are multiple possibilities for transmission in the 5 buildings. Among them, there may be vertical transmission in Room E on the 15th to 17th floors. The initial inspection of the building’s throat is in good condition, but the U-shaped air barriers of two units are dry, and one of them is confirmed. A unit; some units have converted the kitchen draining area into a servant's room, and the U-shaped channel is also dry; in addition, he once entered a unit that had been vacant for several months and he smelled the "toilet smell".
Among the 10 confirmed households, 4 are foreign domestic helpers, of which 3 are Indian domestic helpers and 1 is a Filipino domestic helper.
Yuan pointed out that the domestic helpers doing housework in the toilet and kitchen are very close to the patio, and they may even sleep next to them, which may increase the risk of infection.
Government expert consultant and Chair Professor of the Department of Microbiology, Hong Kong University, Yuan Guoyong, visited Laguna City, Lantian this morning (25th).
(Photo by Wang Jieen)
Chimney or turbulence effect caused by patio
Yuan also pointed out that the building may have a chimney effect. Because the D and E rooms are the same patio, the space is deep, which traps the contaminated air. If a household is diagnosed, the warm air will be pumped to the upper floors by the exhaust fan; Yuan Yi It cannot be ruled out that the building has a turbulent effect, or that the virus can flow to the top floor and affect the 26th floor.
Yuan said that the residents of Unit E in the entire building of Laguna City 5 will be evacuated. As some residents connect Units E and F, some units of F will have to be evacuated. However, at this stage, it is unknown how many units are involved and need to be verified by the management office.
Yuan also pointed out that there are 648 to 774 households in the 5 blocks, but only 463 people participated in the mandatory test earlier, reflecting that many people did not have the test, and the ratio was between 30 and 40%.
He urged citizens who are required to undergo compulsory testing to get tested as soon as possible for themselves and their families.
As for the confirmed security guards living in the new reclaimed street, Yuan believes that if the epidemic in the area is not controlled, it may spread to multiple areas. Just like "closing the area," if you do it early, you will be scolded and you will be accused .
It is difficult to tie a balance. I hope that the citizens will understand that it is not easy to control the epidemic. It is like running a steel wire, and it is difficult to find a balance.
Yuan Guoyong
▼Jordan specified restricted area blockade and detection conditions on the night and day of January 23▼
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▼Jordan specifies that the "restricted area" will be blocked from 1.23▼
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