REAGENT or RESOURCE	SOURCE	IDENTIFIER
Antibodies
Goat anti-human IgA cross-adsorbed secondary antibody, HRP	Invitrogen	Cat# A18787;RRID:AB_2535564
Goat anti-human IgM secondary antibody, HRP	Invitrogen	Cat# 31415; RRID:AB_228282
Goat anti-human IgG Fc, multi-species SP ads-HRP	SouthernBiotech	Cat# 2014-05; RRID:AB_2795580
Biological samples
Asymptomatic individual serum	The Blood Connection	N/A
COVID-19 patient serum	MUSC Biorepository	N/A
Chemicals, peptides, and recombinant proteins
SARS-CoV-2 Spike protein	LakePharma	Cat# 46328
SARS-CoV-2 RBD protein	LakePharma	Cat# 46438
MERS-CoV Spike protein	Sino Biological	Cat# 40069-V08B
SARS-CoV Spike protein	Sino Biological	Cat# 40634-V08B
hCoV-HKU1 Spike protein	Sino Biological	Cat# 40606-V08B
hCoV-OC43 Spike protein	Sino Biological	Cat# 40607-V08B
hCoV-NL63 Spike protein	Sino Biological	Cat# 40604-V08B
Critical commercial assays
SARS-Cov-2 surrogate virus neutralization test	Genscript	Cat# L00847