Original title: The new model can assess the risk of new crown virus infection in offices and schools. The results show that ventilation is very important. Source: Qianlong.com
Science and Technology Daily (Reporter Liu Xia) According to a recent report on the official website of the University of Cambridge in the United Kingdom, scientists from the University of Cambridge, Imperial College and the University of Leeds have developed a model to predict the risk of the new crown virus in offices and schools. Monitored carbon dioxide (CO2) and office and school occupancy to predict how many people may be infected by an asymptomatic patient.
The model shows that employees working in a well-ventilated, quiet office are less likely to infect each other through airborne particles, but if the room is poorly ventilated or employees participate in activities that require a lot of speech, the risk of infection increases. For example, in a well-ventilated but noisy call center, each infected person may infect another 2-4 people. Moreover, if the infected person is a “super spreader,” the risk may also increase.
The model also shows that halving office usage can reduce the risk of airborne transmission by a factor of four. The research results were published in the latest issue of the “Interior and Built Environment” magazine.
The researchers explained that in areas with low ventilation rates and high occupancy rates, the CO2 concentration is high, so monitoring the CO2 concentration can issue warnings to building managers to determine where the risk of spreading the new crown virus is higher, and then take appropriate measures. Intervention measures, such as improving ventilation, changing worker attendance patterns to reduce room occupancy rate, etc. In shared spaces such as offices and classrooms, there are more and more opportunities to be exposed to infectious substances in the air, and room occupancy rates may vary. By monitoring the CO2 concentration, the model can assess people’s risk of infection.
Professor Paul Linden from the Department of Applied Mathematics and Theoretical Physics of the University of Cambridge, one of the research leaders, said: “Because the airflow is invisible to human eyes, it is difficult to understand the impact of the new coronavirus at home or in the workplace. At present, many schools have installed them. If a commercial CO2 monitor is installed, I recommend installing it in the workplace.”
Another author of the research paper, Dr. Henry Bridge of Imperial College London, said: “Our work emphasizes the importance of good ventilation in workplaces and schools. The model shows that by managing the ventilation and occupancy of shared spaces, you can Control the risk of airborne infections such as the new coronavirus.”
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