id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-324902-18h0maxi	Liu, Xuemei	Patterns of IgG and IgM antibody response in COVID-19 patients	2020-06-09		.txt	text/plain	1117	66	54	As shown in Figure 1 , anti-SARS-CoV-2 S-specific IgG and IgM antibodies were not detectable in the very early days of infection (from day 0 to day 3). Anti-SARS-CoV-2 S-specific IgG antibodies were identifiable from day 7 onwards, peaking at approximately day 25, as shown in Figure 1(A) . Figure 1(B) shows a typical IgG and IgM antibody response in a 65-year-old woman with COVID-19 (supplementary materials, Table 1 ). As shown in Figure 1 (C), serum IgG antibody levels were not significantly correlated with clinical severity in the early stage of infection. Severe cases of COVID-19 tended to have a more vigorous IgG response against SARS-CoV-2 compared with mild cases. Our results also showed that mild cases tended to develop faster peak anti-SARS-CoV-2 S-specific IgM responses (approximately 17 days after symptom onset) compared with severe cases (approximately 21 days after symptom onset).	./cache/cord-324902-18h0maxi.txt	./txt/cord-324902-18h0maxi.txt