1. Summary of QUADAS‐2 'risk of bias' assessment for screening studies.
| Study | D1: Traveller selection | D2: Index test | D3: Reference test | D4: Flow and timing |
| Symptom screening | ||||
| Al‐Qahtani 2020 | Low | Unclear | Low | Unclear |
| Arima 2020 | Unclear | Low | Low | Unclear |
| Chen J 2020 | Low | Unclear | Low | Unclear |
| Hoehl 2020 | Low | Low | Unclear | Unclear |
| Kim 2020 | Low | Low | Unclear | Low |
| Lytras 2020 | Low | Unclear | High | Unclear |
| Ng 2020 | High | Low | Low | Unclear |
| Wong J 2020 | Unclear | Unclear | Unclear | Unclear |
| Yamahata 2020 | Low | Unclear | High | High |
| PCR test | ||||
| Arima 2020 | Unclear | Low | Low | Unclear |
| Al‐Qahtani 2020 | Low | Low | Low | Unclear |
| Al‐Tawfiq 2020 | High | Low | Low | Low |
| Lagier 2020 | High | Unclear | Low | Unclear |
| Lio 2020 | Unclear | Low | Low | Low |
| Ng 2020 | High | Low | High | Unclear |
| Shaikh Abdul Karim 2020 | Low | Low | Low | Unclear |
| Combined | ||||
| Al‐Qahtani 2020 | Low | Low | Unclear | Unclear |
| Arima 2020 | Unclear | Low | Low | Unclear |
| Chen J 2020 | Low | Low | Low | Unclear |
| Lio 2020 | Unclear | Low | Low | Low |
| Shaikh Abdul Karim 2020 | Low | Low | Unclear | Unclear |