| Detection rate | |
|---|---|
| RT-PCR | |
| Nasophargyneal aspirate | 32% day 3, 68% day 14 (conventional RT-PCR) |
| 80% with real time quantitative RT-PCR assay during first 3 days | |
| Stool | 97% day 14 |
| Urine | 42% day 15 |
| Real time quantitative serum SARS CoV RNA | 80% day 1, 75% day 7, 45% day 14 |
| Serology | |
| IgG seroconversion to SARS CoV | 15% day15, 60% day 21, >90% day 28 |