Performance of different detection methods in different periods post onset
| Days after onset | Patients n | RNA# | ELISA-Ab | ELISA-IgM | ELISA-IgG | ||||
| Positive n | Sensitivity % | Positive n | Sensitivity % | Positive n | Sensitivity % | Positive n | Sensitivity % | ||
| 0–7 | 39 | 36¶ | 100.0 | 25 | 64.1 | 13 | 33.3 | 13 | 33.3 |
| 8–14 | 75 | 64¶ | 90.1 | 74 | 98.7 | 65 | 86.7 | 57 | 76.0 |
| 15–29 | 60 | 41¶ | 70.7 | 60 | 100.0 | 58 | 96.7 | 56 | 93.3 |
Ab: antibody. #: tested using deep sputum samples; ¶: 36, 71 and 58 patients underwent RNA testing during the periods 0–7, 8–14 and 15–29 days post onset, respectively.