id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-350715-x92g6bnk	Zheng, Yutong	Analysis of the application value of serum antibody detection for staging of COVID‐19 infection	2020-07-23		.txt	text/plain	1495	121	53	We conducted a retrospective analysis to explore the clinical characteristics of COVID‐19 patients at different infection stages and to characterize the characteristics of specific serum antibodies at each stage. In this study we explored the clinical value of specific serum antibody detection in COVID-19 patients. According to the biological characteristics of nucleic acids and specific serum IgM and IgG antibodies, the 723 COVID-19 cases were classified into infection stages ( Table 1) . (2) the convalescent stage in which the nucleic acid turned negative, the IgM antibody disappeared and the IgG antibody began to appear but was still below the detection limit. IgM+IgG-May be in the acute stage of infection, consider the possibility of false negative nucleic acid. Consider the possible active stage of infection with false negative nucleic acid.	./cache/cord-350715-x92g6bnk.txt	./txt/cord-350715-x92g6bnk.txt