id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-290642-vlyingsf	Kwon, S.	Association of social distancing and masking with risk of COVID-19	2020-11-13		.txt	text/plain	5474	273	50	We examined the association of community-level social distancing measures and individual masking with risk of predicted COVID-19 in a large prospective U.S. cohort study of 198,077 participants. Here, we conducted a prospective study in the U.S using a smartphone-based application that collected self-reported, individual-level information on COVID-19 like symptoms, masking and other personal risk factors, in combination with community-level social distancing measures to investigate the relative effectiveness of social distancing and masking policies with the risk of COVID-19. In this prospective study of 198,077 participants using a real-time mobile phone application in U.S., we observed that individuals living in communities with the greatest social distancing had a 31% lower risk of predicted COVID-19 compared with those living in communities with poor social distancing, with maximum benefit evident after a latency period of 14 days. ; https://doi.org/10.1101/2020.11.11.20229500 doi: medRxiv preprint community with greater social distancing and risk of predicted COVID-19 was most consistently observed among younger individuals without significant health problems or limitations in mobility.	./cache/cord-290642-vlyingsf.txt	./txt/cord-290642-vlyingsf.txt