id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-295386-voeptwrw	Liu, J.	Analysis of Collective Response Reveals that COVID-19-Related Activities Start From the End of 2019 in Mainland China	2020-10-16		.txt	text/plain	6162	365	62	. https://doi.org/10.1101/2020.10.14.20202531 doi: medRxiv preprint "cough" (20 th ), are included within the top keywords To analyze the early stage of the COVID-19 epidemic, we study the correlation of the search index of the high-ranked keywords between any two of the four regions (Wuhan, China, the US, and the world), using DCCA for each year between 2014 and 2020. . https://doi.org/10.1101/2020.10.14.20202531 doi: medRxiv preprint the correlations between Wuhan and the world, Wuhan and the US, the world and China, and the US and China have significantly changed and have dropped to negative in 2020, while the overall trends of search index dramatically increased in the same time, compared with other years. From the analysis, we can see that the general public in Beijing exhibited a high level of attention to the overall event as the search volume of a majority of keywords, e.g., "nucleic acid," "epidemic," "mask," "sore throat," and "fever," surges significantly following the outbreak on June 11th, where the search index of "nucleic acid" shown in Figure 2 is an example.	./cache/cord-295386-voeptwrw.txt	./txt/cord-295386-voeptwrw.txt