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COVID-19 detection in various clinical samples (positive rate).
| Clinical specimen | Wang et al. study [24] |
Wölfel et al. study [52] |
|---|---|---|
| Total cases: 1070 samples from 205 patients | Total cases: 13 samples from 4 patients | |
| BAL fluid | 93% | NT |
| Sputum | 72% | 83.33% |
| Nasal swabs | 63% | 16.66% |
| Brush biopsy | 46% | NT |
| Pharyngeal swabs | 32% | NT |
| Stool | 29% | Test was not successful |
| Blood | 1% | NT |
| Urine | 0% | NT |
Samples were prepared during the first week of symptoms. BAL (bronchoalveolar lavage), NT (not tested).
