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Written by: Cui Zheng Zheng
2020-03-18 03:48
Last updated: 2020-03-18 03:48The new coronavirus pneumonia (commonly known as Wuhan pneumonia) epidemic continued to spread in Hong Kong. Three confirmed patients in Hengtai Building, Fuheng Village, Tai Po, lived in the same building, that is, Unit 13 and the Department of Health was in Room 13 of the entire building. A virus was also detected inside the roof vent of the exhaust throat.
A government spokesman said on Tuesday (17th) that there were preliminary suspicions that due to the difference in height of the roof fence between units 13 and 14, the "turbulence phenomenon" may be more likely to appear in the patio location on the upper floors of the Hengtai Building.
"Hong Kong 01" was shot with an aerial camera earlier. It was also found that the rooftop wall of Unit 13 was lower than the rooftop of Unit 14. Yuan Guoyong, Chair Professor of the Department of Microbiology of the University of Hong Kong, believes that the current test results may indicate that "turbulent effects" may cause infection of higher-level units, but other factors have not been completely ruled out.
"Hong Kong 01" was previously shown by aerial photography. The rooftop wall of Unit 13 (left) is lower than the rooftop wall of Unit 14 (right). The height of the ventilation pipe of the ditch roof of Unit 13 is lower than the rooftop wall of Unit 14. When the wind blows from the unit 13 to the direction of the wall of the unit 14, a turbulent effect will be generated, and the virus released from the ventilation pipe will fall to the patio between the units. (Profile picture)
Government: It is estimated that individual cases are not common
A government spokesman said on Tuesday evening that the virus was found in the dung roof ventilation ducts. The government initially suspected that due to the difference in height of the roof fence between units 13 and 14, the "turbulence phenomenon" may be more likely to occur in Hengtai. The patio location on the upper floor of the building appeared. Nonetheless, the introduction of viruses from dung roof ventilation pipes into residential units through turbulence requires the cooperation of multiple environmental factors, including the building orientation, roof design, wind speed, and wind direction. Even if the "turbulence phenomenon" is determined to have occurred, the relevant government departments estimate that the situation is only an isolated case and is not common.
Yuan Guoyong: Virus particles are easily blocked by the rooftop fence of Unit 14
Yuan Guoyong, Chair Professor of the Department of Microbiology of the University of Hong Kong, believes that the current test results may indicate that the "turbulent effect" may cause higher-level units to be infected. Because the rooftop wall of Unit 13 is short, virus particles are easily affected by Unit 14 when the wind blows. The roof fence was blocked, and then passed from the patio to the higher floors, but other factors could not completely rule out this transmission.
On March 14, Yuan Guoyong, a professor in the Department of Microbiology of the University of Hong Kong, arrived at Hengtai Building, Fuheng Village, Tai Po at about 7 pm to learn about the throat and the way of infection. (Profile picture / Photo by Li Zetong)
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