A total of 7 people in the Wangyuelou transmission group in Festival Walk have been infected.
Government expert consultant and Chair Professor of the Department of Microbiology, Hong Kong University, Yuan Guoyong met with reporters after an inspection at Wangyue Tower today (4th).
He showed the Mochizuki Tower seating plan, saying that the confirmed crew member had a headache while having a meal with his father, but was sitting in the middle of the restaurant (Taiwan A2). Even though the restaurant was windy, the air exchange rate was uneven in different places, and barriers were added. There are gaps between them, and because of the high ceilings, the air cleaners may not be able to purify the air in lower places, so that the virus stays in the corners and has a chance to spread.
Yuan Guoyong described that the restaurant's epidemic prevention measures and equipment have actually been "good enough." Only 6 of the 206 people in the same scene have been diagnosed, and the infection rate is less than 3%, which is far lower than the earlier over 30% of restaurants in Tsim Sha Tsui.
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High possibility of airborne transmission
Yuan Guoyong said that Wangyue Tower has 14 air purifiers, and there are four regional "desk specialists". The cleanliness, sanitation and ventilation of the kitchen are all up to standard. Although it is not ruled out that waiters may go to other areas to serve guests. The closed-circuit television will be checked to see if there is such a situation, but it is initially believed that the chances of transmission through shared dining cards and kettles are relatively small, but the possibility of air transmission is higher.
Mochizuki Tower has strong wind but uneven ventilation
Yuan Guoyong and the Electrical and Mechanical Services Department, food and environmental protection staff and personnel from the protection center arrived at the scene today (4th) to conduct a smoke test. He said that there are strong winds in different places in the restaurant, but the air exchange rate in different places is uneven. Almost all the wind in the shop is through the direction of the kitchen. As a result, the air flow was insufficient. In addition, the confirmed flight crew was sitting at the entrance of the restaurant with his father on the A2 station in the middle position. It lasted about an hour and 40 minutes. The virus kept being driven in the restaurant, and there was a gap between the barriers. The virus can flow into the VIP room through the gap and stay there, or infect corners and corner diners of the VIP room.
The newly confirmed case is a 13-year-old girl who is sitting on platform 95 with her mother.
Yuan Guoyong said that the Moon Tower in Festival Walk is adequate, but the smoke test shows that it may be because the ceiling is too high and the air cleaner fails to purify the air near the ground. In addition, there are gaps between the barriers and uneven air exchange in different places. The crew sat in the middle of the restaurant for an hour and 40 minutes, causing the virus to flow in the restaurant and stop in the corner.
(Photo by Zheng Zifeng)
The ceiling is high, and the air purifier may not purify the air in a low position
He said that the air purifier in Mochizuki Tower uses the UV principle, but the bottom of the restaurant is 4.1 meters high, and the air purifier is about 3.5 meters high. It may only be able to purify the "upper air", and the diners, the lower position The air is not purified, so it has been suggested to install an air purifier on the floor to reduce "dead spots".
Yuan Guoyong reiterated that the restaurant has "done well", causing about 206 people in the audience at the same time, and 6 of them were temporarily infected. The infection rate is less than 3%, which is far lower than the previous 30% of the Tsim Tsui restaurant group.
He once again urged people who are unwell to refrain from eating out and seek medical examination as soon as possible; people who have not received the injection should receive the new crown vaccine as soon as possible.
When asked how to retrieve the remaining six diners, Ou Jiarong, the chief physician of the Infectious Diseases Department of the Health Protection Center, said that the six people involved two diners. The public provided information to contact the guests. All of them have undergone compulsory testing and all were negative. However, they will be sent to the Penny's Bay Quarantine Center as soon as possible.
▼Festival City ``Bird Ten'' is internally connected to the same group ``Wangyue Tower'' ▼
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