id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-296867-6o4scan1	Hisada, Shohei	Surveillance of early stage COVID-19 clusters using search query logs and mobile device-based location information	2020-10-29		.txt	text/plain	3803	206	59	title: Surveillance of early stage COVID-19 clusters using search query logs and mobile device-based location information In contrast, we utilized web search query logs per user to detect WSSCI and gather their location histories to identify locations they visited or passed through, resulting in COVID-19 cluster detection. In the Kitami area (Fig. 3a) , the WSSCI has a maximum cross-correlation of 0.766, determined 2 days after the change in the number of new patients. This study attempted to detect early clusters by identifying people who suspected their own COVID-19 infection using web search query logs and by extracting their location information. We utilized web search query log data and location information provided by Yahoo Japan Corporation 17 as signals for syndromic surveillance. Syndromic surveillance using search query logs and user location information from smartphones against COVID-19 clusters in Japan	./cache/cord-296867-6o4scan1.txt	./txt/cord-296867-6o4scan1.txt