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However, there's mounting evidence about the spread of covid 19 in crowded and poorly ventilated indoor environments 


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There is mounting evidence about the spread of COVID-19 in crowded and poorly ventilated indoor environments. Studies have shown that indoor spaces such as classrooms, dormitories, and office buildings are particularly susceptible to the airborne transmission of the virus . Ventilation plays a crucial role in controlling the spread of the disease, with natural ventilation or a combination of mechanical and natural ventilation being highly effective . Strategies such as mixed-mode ventilation, air-curtain flow patterns, and dynamic ventilation control based on real-time infection risk have been proposed to mitigate the risk . Monitoring CO2 concentration levels and air quality can serve as indicators of air contamination and the need for ventilation and sanitization systems . Computational fluid dynamics simulations have been used to assess the dispersion and transport of respiratory droplets in indoor spaces, aiding in risk assessment and the design of ventilation systems . Overall, proper ventilation and control measures are essential in reducing the transmission of COVID-19 in indoor environments .

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The provided paper discusses the measurement of indoor environment and occupant behavior in classrooms to assess airborne infection risk. It does not specifically mention evidence about the spread of COVID-19 in crowded and poorly ventilated indoor environments.
The provided paper discusses the dispersion and transport of respiratory droplets in an indoor space with an air ventilation system. It does not specifically mention evidence about the spread of COVID-19 in crowded and poorly ventilated indoor environments.
The paper discusses the importance of maintaining optimal conditions such as ventilation in indoor settings to control the spread of COVID-19. It does not specifically mention evidence about the spread of COVID-19 in crowded and poorly ventilated indoor environments.
The provided paper discusses the importance of proper ventilation in indoor environments, particularly in schools, to reduce the risk of COVID-19 contagion. It evaluates different ventilation strategies and highlights the effectiveness of combining solutions like mixed-mode ventilation and facial masks. However, it does not specifically mention the evidence of COVID-19 spread in crowded and poorly ventilated indoor environments.
The paper discusses the design and implementation of a smart COVID-19 spread control system for indoor environments, focusing on improving air quality and CO2 levels through automatic ventilation and sanitization systems. It does not specifically mention evidence about the spread of COVID-19 in crowded and poorly ventilated indoor environments.

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