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Sensitivity of SP-NLISA and control assays for testing of NP antigens in serums from COVID-19 patients.
| Clinical typing | Sample (Nb) | SP-NLISA (Nb/%) | Pt@AuNP ELISA (Nb/%) | HRP-ELISA (Nb/%) | Biodragon ELISA (Nb/%) |
| Severe | 14 | 13 (92.8%) | 10 (71.4%) | 5 (35.7%) | 5 (35.7%) |
| Mild | 23 | 15 (65.2%) | 11 (47.8%) | 2 (8.7%) | 2 (8.7%) |
| Overall | 37 | 28 (75.7%) | 21 (56.7%) | 7 (18.9%) | 7 (18.9%) |
