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Carbon dioxide (CO2) levels in the classrooms of schools in South Africa, Switzerland, and Tanzania.
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posted on 2024-01-18, 18:26 authored by Nicolas Banholzer, Remo Schmutz, Keren Middelkoop, Jerry Hella, Matthias Egger, Robin Wood, Lukas FennerHistogram of the measured CO2 levels (in parts per million [ppm]) in each country. All distributions are truncated at 400ppm (left) and 4,000ppm (right).
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using carbon dioxideparts per millioncongregate indoor settingscalled quanta ).cri ]), basedair change rate8 %- 43infectious disease transmissiontanzanian secondary schoolsdiv >< pbetter natural ventilation7 %- 890 %- 3airborne transmission risks1 %- 8mycobacterium tuberculosis 1 %- 6modeled transmission risksairborne transmissionventilation ratemtb infectious studentsinfectious doses8 %)tracer gasspecific reportingspecific estimatessouth africansouth africariley equationrespiratory infectionsreported estimatesprovide highppm ])monthly riskmodeled risklevel informationinterquartile rangehigher incidenceglobal comparisonsexcess mortalityestimated basedcredible intervalannual risk757 ppm648 ppm610 ppm6 %)4 %)
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