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Written by: Golden Chess
2021-04-24 11:27
Last update date: 2021-04-24 11:34
The new crown pneumonia epidemic in Hong Kong has repeated, or another variant of the virus may flow into the community.
The Centre for Health Protection said yesterday (23rd) that one of the initial confirmed cases was a Filipino domestic helper with a variant virus. She went to the employer of Kennedy Terrace, a luxury house at No. 8 Kennedy Road, Central after she was quarantined at the Ramada Hotel in Sai Ying Pun. at home.
Yuan Guoyong, the chair professor of the Department of Microbiology of the University of Hong Kong who has visited the hotel, suspects that there may be airborne transmission in the hotel.
Professor Pan Liewen of the School of Public Health of the University of Hong Kong said today (24th) that droplets carrying the new coronavirus can stay in the air for several hours. It is recommended that citizens under quarantine close their windows before opening their doors, and hotels should also lower their occupancy rates.
Pan also believes that in order to face up to the problem that patients with variant new coronavirus have been active in the community, he suggests that the government take the initiative to take "radical" control measures, including mandatory testing and quarantine measures, to stop the source.
▼On 4.23 Kennedy Road, the luxury house Kennedy Terrace is evacuated for quarantine▼
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Yuanbailiang: Hotel corridors do not have special ventilation design and can be equipped with air cleaners
Yuan Boliang, the president of the Institute of Engineers, also stated in the TV and TV program "Saturday Accountability" that hotel rooms generally have a little positive pressure design to prevent smell and moisture from entering the room, but I believe that quarantine hotels have "worked hard." The ventilation volume is higher than the fresh air volume and becomes a slight negative pressure.
However, he pointed out that if someone opens the window while opening the door, the air in the room will have a chance to blow into the corridor and then into the nearby room.
He also pointed out that there will be no special ventilation design in the hotel corridors, so the air exchange rate is not high; and the narrow place will make the air even more impervious.
He suggested installing air cleaners in the corridors to increase air exchange.
As for whether it is necessary to require the air exchange rate in hotel corridors to meet certain requirements, he said that factors such as the flow of people should be measured, and that the inspection can refer to the standard of 6 air exchanges per hour in restaurants.
▼4.16 The residents of Burgars Building, Jordan changed from forced quarantine to evacuated quarantine▼
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Pan Liewen: Hotel quarantine personnel should close the window before opening the door
Professor Pan Liewen of the School of Public Health of the University of Hong Kong pointed out in the same program that droplets carrying the new coronavirus can stay in the air for several hours. Therefore, even if the air transmission efficiency is low, it may still cause transmission.
He suggested that citizens should be quarantined and the windows should be closed before opening the door: "It is wise to reduce air movement first." You should also wear masks in corridors.
Hotels should lower their occupancy rates, so that the overall virus load can also be reduced accordingly, and it will also help to concentrate on the places where people are staying and reduce the risk of transmission.
Pan Liewen also pointed out that according to the research of the University of Hong Kong, no variant virus has flowed into the community. However, due to the frequent flow of people in Hong Kong, it will spread in the community when it relaxes.
He believes that the government must face up to the problem that patients with variants of the new crown virus have been active in the community, and suggested that the government take the initiative to take "radical" control measures to reduce risks, including mandatory testing and quarantine measures to stop the source.
As for whether close contacts of close contacts should be required to be quarantined, Pan Liewen pointed out that if the scope of quarantine is expanded indefinitely, there is a chance that all people in Hong Kong will be quarantined, which is not a rational approach.
Professor Pan Liewen, Hong Kong University School of Public Health.
(Photo/Photo by Ou Jiale)
For the two scientific committees of the Center for Health Protection, we are discussing shortening the quarantine period for close contacts of people who have been vaccinated against the new crown vaccine.
Pan Liewen said on a radio program that some people may not have a very good immune response after being vaccinated. Therefore, even if they have received two injections, they may not be able to prevent the mutant virus. Therefore, even if the quarantine period is allowed to be shortened, follow-up measures must be taken.
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