Monoclonal Antibody-Based Antigen Capture Enzyme-Linked Immunosorbent Assay Reveals High Sensitivity of the Nucleocapsid Protein in Acute-Phase Sera of Severe Acute Respiratory Syndrome Patients

TABLE 1.

Results of the N protein of SARS-CoV assay for sera from patients with SARS in the neutralization test-positive group

Days after onset of symptoms	No. of patients with positive sera/total no. of patients with SARS (%)
1-5	19/19 (100)
6-10	5/5 (100)
11-15	0/11 (0)
16-20	0/6 (0)