REAGENT or RESOURCE	SOURCE	IDENTIFIER
Antibodies
Mouse-anti-human CD3-FITC (clone UCHT1)	Agilent	Cat#F081801; RRID: AB_578681
Mouse-anti-human CD4-APC (clone MT310)	Agilent	Cat#C722601; RRID: AB_578593
Mouse-anti-human CD8-RPE (clone DK25)	Agilent	Cat#R080601; RRID: AB_579542
Mouse-anti-human CD45-APC (clone T29/33)	Agilent	Cat#C723001; RRID: AB_578595
Biological samples
Serum	This paper	N/A
Feces	This paper	N/A
Chemicals, peptides, and recombinant proteins
TIANamp Stool DNA Kit	TIANGEN	Cat#DP328
phosphoric acid	Sigma-Aldrich	Cat#345245
diethyl ether	Sigma-Aldrich	Cat#673811
C-reactive protein kit	Beckman Coulter	Cat#OSR6299
IL-6 detection kit	Siemens	Cat#LK6P1
IL-8 detection kit	Siemens	Cat#LK8P1
TNF-α detection kit	Siemens	Cat#0274
IgG	Beckman Coulter	Cat#OSR61172
IgA	Beckman Coulter	Cat#OSR61171
IgM	Beckman Coulter	Cat#OSR61173
IgE	Beckman Coulter	Cat#IM2122
Critical commercial assays
Coronavirus (2019-nCoV) IgM antibody diagnostic kit	Bioscience Co.	Cat#20203400182
Coronavirus (2019-nCoV) IgG antibody diagnostic kit	Bioscience Co.	Cat#20203400183
ACE2-RBD inhibiting assay	Bioscience Co.	N/A
GC-MS analysis	PANOMIX Tech Co.	N/A
Deposited data
Raw sequencing data	National Genomics Data Center	https://ngdc.cncb.ac.cn/gsa/
Software and algorithms
GraphPad Prism v.9	Graphpad	http://graphpad-prism.cn/
R v4.0.2	R Core Team	https://www.R-project.org/