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Author: Zhu Haiqi
2020-12-14 20:23
Last update date: 2020-12-14 20:24
The new crown pneumonia situation appeared "Heng Tai House 2.0, Fu Heng Village". The first case was discovered at Kwai Tung House, Tung Tau Village, Wong Tai Sin at the end of last month. Within an incubation period, 5 more households were recruited, and a total of 9 people were infected, of which 3 The households are 15 rooms in the same seat.
Professor Yuan Guoyong of the Department of Microbiology at the University of Hong Kong suspects that Guidong Building will have a "turbulent effect" after Hengtai Building in Tai Po. The virus will be swept into high-rise units from the lower floors via the north wind. Residents in the 15 rooms above the 23rd floor have to be evacuated. Quarantine Center.
Yuan Guoyong and other experts inspected the Guidong Building and found that some units were infected due to the turbulence effect.
(Photo by Luo Junhao)
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The first patient in Guidong Building in recent months lived in Room 15 on the 23rd floor, belonging to the LOHAS Park site group. Four people in the household were eventually diagnosed.
A week later, a household in room 15 on the 24th floor was also infected with the disease. Today, a household in room 15 on the 29th floor was also recruited, which aroused concerns about "vertical transmission".
Yuan Guoyong, Chief Doctor Ou Jiarong of the Infectious Diseases Division of the Center for Health Protection, and Liang Qiming, Chief Environmental Officer of the Environmental Protection Agency, visited the site yesterday. Yuan Guoyong said that Guidong’s rear throat pipes had no bursts, unmanned refitting pipes, and U-shaped gas barriers. Four people in the household were diagnosed. The virus load in the unit was very high. When taking a bath with hot water, the warm air rose and followed the exhaust fan against the kitchen window on the 24th floor. When the households in Room 15 on the 24th floor were cooking, they often opened the windows. And the range hood is made into a negative pressure environment, and the virus particles are drawn into the house to infect the residents.
As for the reason for the recruitment of the residents on the 29th floor, Yuan Guoyong estimated that there was a "chimney effect", and the feces walked to the roof along the vent pipe. The windows of the residents on the 29th floor were facing south, and the current wind direction was north. It is estimated that this would bring the virus into the house.
Leung Kai-ming added that the roof pipes are short, less than 1 meter away from the wall, so the north wind is more likely to involve the virus in the unit and infect the residents. The Buildings Department will follow up the situation.
Yuan Guoyong and other experts inspected the Guidong Building and found that some units were infected due to the turbulence effect.
(Photo by Luo Junhao)
Yuan Guoyong pointed out that the situation is similar to the "turbulent effect" of Tingtai Building in Tai Po in March this year, but not similar to the recent outbreak of Regent Garden. He described the virus being drawn into the kitchen as a new discovery. If someone is diagnosed in the unit downstairs of the household, the public should Close the window and turn on the range hood to cook.
He also pointed out that the residents of Room 15 above the 23rd floor must be evacuated to the quarantine center until the Environmental Protection Department assesses it clearly. Other units in the building are less affected and do not need to be evacuated, but testing will be done tonight.
As for the absence of a "foot ban", Yuan Guoyong cited the experience of the Regent Garden. At that time, residents were allowed to enter and exit, and no transmission occurred. The most important thing is to complete the test as soon as possible. It is expected that there will be all test results tomorrow night.
Over a hundred residents of Regent Gardens queued up for testing before 10 o'clock this morning.
(Photo by Zhong Yan)
He also revealed that Li Yuguo, deputy dean of the School of Engineering of the University of Hong Kong, led a team to conduct carbon dioxide tracking work in the Regent Garden to determine whether there is "aerosol" transmission in the local area.
Yuan Guoyong urged citizens to seek professional assistance to check the pipes once they smell peculiar smells in the toilets or when using exhaust fans, pour half to one liter of water to the U-shaped pipes every week, and the protection center will also collect the environment from the affected units Samples, including exhaust fans, windows and air hoses, etc.
In addition to the above three households, there were confirmed cases in Room 06 on the 19th Floor, Room 04 on the 21st Floor and Room 16 on the 21st Floor of Guidong Building. They were cases of no source, workplace and Cailong Restaurant on Wo Tsai Street in Sham Shui Po.
Winter will keep respiratory viruses longer. Yuan Guoyong pointed out that the winter epidemic must be worse than summer. Because the air is drier in winter, the particles are easy to evaporate, and the particles are smaller and can stay in the air for longer. Therefore, there will be more cases of no source in winter. , Urged the public to pay attention to hand hygiene and wear masks, hoping that the epidemic will fall back on Christmas, and everyone will be happy.
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