id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-292274-upwn9o2m	Ghaffari, Abdi	COVID-19 Serological Tests: How Well Do They Actually Perform?	2020-07-04		.txt	text/plain	4648	244	44	While IgM and IgG antibodies have been the leading candidates in COVID-19 serological test development, recent studies show that IgA, predominately present in the mucosal tissue, may also play a critical role in the immune response and disease progression [12] . While IgM and IgG antibodies have been the leading candidates in COVID-19 serological test development, recent studies show that IgA, predominately present in the mucosal tissue, may also play a critical role in the immune response and disease progression [12] . Typically, RDT test strips use a drop of blood to detect the presence of patient antibodies (IgG, IgM, or IgA) produced against a specific SARS-CoV-2 antigen ( Figure 2 ). Critics point to gaps in our understanding of immune response to COVID-19 infection, including the ability of serological tests to detect neutralizing antibodies and the capacity of the immune system to provide long-term immunity against SARS-CoV-2.	./cache/cord-292274-upwn9o2m.txt	./txt/cord-292274-upwn9o2m.txt