More infections in poorly ventilated classrooms

Long-term measurement: A sensor for carbon dioxide and other data in a classroom in Chur. Image: Canton of Grisons / Mattias Nutt Photography - Indoor air quality has an influence on how many corona virus infections occur there. This has now been shown for the first time in a pilot project involving researchers in 150 primary school classrooms in Graubünden. The analysis also showed that the air quality in many classrooms is poor. The study concluded that regular ventilation of classrooms is therefore very important, even in winter months. Using 300 CO2 sensors, the Graubünden Health Department, together with researchers, investigated the air quality in 150 classrooms in the canton of Graubünden. In parallel, the number of positive Corona test results in these classrooms was recorded.