Table 2.

Summary table on the present diagnostics used for SARS-CoV-2 on their limits of detection (LOD) and analysis time.

Detection Approach	Diagnostic Platforms	Target Analyte Detected	LOD	Analysis Time	References
Nucleic acid amplification	qRT-PCR	SARS-CoV-2 E and RdRp genes	3.9 copies/reaction (E gene); 3.6 copies/reaction (RdRp gene)	2–4 h	[61]
	RT-LAMP with colorimetric detection	SARS-CoV-2	100 copies/reaction	30–60 min	[62]
Detection of viral antibodies and antigens	Capture ELISA immunoassay	anti-SARS-CoV-2 IgG and IgM	2.384a (IgG); 2.187a (IgM)	2.5 h	[63]
	ELISA immunoassay	SARS-CoV-2 antigens (N and S proteins)	100 pg/mL	3–5 h	[64]

^aFold change over average reading of negative controls.