| Enrolling by invitation | N/A | 1000 | Europe | Blood sampling, Online Questionnaire | University of Bern, Interregionale Blutspende SRK Bern | SARS-CoV-2 Infection, Volunteers, Healthy | 01/22 | 06/22 | | |
| Active, not recruiting | N/A | 250 | Europe | | University Hospital, Basel, Switzerland | Prosthetic-joint Infection | 03/23 | 06/24 | | |