id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-102746-rimpulm0	Eaton, W. A.	Physics of Virus Transmission by Speaking Droplets	2020-05-16		.txt	text/plain	2440	130	60	Calculations with these equations provide a straightforward way to determine the airborne lifetime of emitted droplets after accounting for the decrease in droplet size from water evaporation. At a relative humidity of 50%, droplets with initial radii larger than about 50 microns rapidly fall to the ground while smaller, potentially-virus containing droplets shrink in size and remain airborne for many minutes. Second, for each relative humidity, how much time does it take for water evaporation to reduce a virus-containing droplet to a size that leaves it floating in air for a sufficiently long time to allow direct transmission of the virus to another person? Determining whether or not a virus-containing droplet will remain airborne to cause an infection requires determination of the rate of evaporation of water, which is a more complex problem and is different for different size regimes.	./cache/cord-102746-rimpulm0.txt	./txt/cord-102746-rimpulm0.txt