Table 2.
Quantitative reverse transcription polymerase chain reaction (RT-qPCR), LUMIPULSE antigen test, and antibody test results for the seven discordant cases.
| Case # | Residence | Antigen test | Antigen level (pg/mL) | RT-qPCR | Viral load (log10 copies/μL) | Antibody test | COI at admission |
|---|---|---|---|---|---|---|---|
| #1 | Brazil | Negative | 0.8 | Positive | 1.1 | Positive | 69.9 |
| #2 | Brazil | Negative | 0.6 | Positive | 1.9 | Positive | 84.3 |
| #3 | India | Negative | 0.18 | Positive | 1.0 | Positive | 1.0 |
| #4 | Japan | Inconclusive | 2.35 | Positive | 2.2 | Positive | 2.6 |
| #5 | Japan | Inconclusive | 1.42 | Positive | 1.3 | Positive | 3.2 |
| #6 | Japan | Inconclusive | 7.85 | Positive | 1.7 | Negative | 0.3 |
| #7 | Japan | Inconclusive | 2.36 | Negative | NA | Negative | 0.09 |
COI, cut-off index; NA, not available.