id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-296043-jc74soom	Butterfield, T. R.	Assessment of Commercial SARS-CoV-2 Antibody Assays, Jamaica	2020-09-29		.txt	text/plain	1650	121	57	Serum samples collected [≥]14 days after onset of symptoms, or [≥]14 days after an initial SARS-CoV-2 RT-PCR positive test for asymptomatics, showed diagnostic sensitivities ranging from 67.9-75.0% when including all possible disease severities and increased to 90.0-95.0% when examining those with moderate to critical disease. For all assays examined, SARS-CoV-2 real-36 time PCR cycle threshold (Ct) values of the initial nasopharyngeal swab sample testing positive 37 were significantly different for samples testing antibody positive versus negative. CoV-2 antibody assays: Roche Elecsys ® Anti-SARS-CoV-2, Abbott Architect SARS-CoV-2 53 preprint (which was not certified by peer review) is the author/funder, who has granted medRxiv a license to display the preprint in perpetuity. When moderate, severe and 109 critical disease was grouped, for each assay there was a significant association between this 110 group and testing antibody positive: Elecsys ® Anti-SARS-CoV-2 (χ 2 =19.03, p=0.001), Architect 111 SARS-CoV-2 IgG (χ 2 =15.72, p=0.003), Euroimmun SARS-CoV-2 IgA (χ 2 =21.11, p=0.007), 112 All rights reserved.	./cache/cord-296043-jc74soom.txt	./txt/cord-296043-jc74soom.txt