id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-032752-9ighp3gx	Bhagat, Rajesh K.	Effects of ventilation on the indoor spread of COVID-19	2020-09-28		.txt	text/plain	8006	388	59	Increased rates of transmission occur not only for buildings, but also on public transportation where people are likely to be in the presence of an infected person in a crowded indoor space for relatively long periods of time and, therefore, exposed to airborne particles (e.g. Hu et al. Since carbon dioxide is also exhaled and carried by the ventilation flow we propose that concentration levels of CO 2 can be used to indicate the potential presence of SARS-CoV-2 in the air, and that high levels should trigger remedial action to reduce the risk of infection. The additional ventilation rate needed to ensure a lower layer of the same height can be calculated by considering the combined effect of two unequal plumes (Cooper & Linden 1996) and is a factor of approximately 1 + (W ex /W) 1/3 ((h − h M )/(h − h V )) 5/3 , where W ex is the heat flux in the exhaled breath, h M the height of the mouth.	./cache/cord-032752-9ighp3gx.txt	./txt/cord-032752-9ighp3gx.txt