Table 3.

The N protein of SARS-CoV in sera of SARS patients

Days after onset	Serum number	Positive number (%)
		N protein	SARS-CoV RNA
1–10	10	9 (90.0)	4 (40.0)
11–15	12	9 (75.0)	3 (25.0)
16–20	14	8 (57.1)	0
21–25	15	1 (6.7)	0
26–62	39	0	0