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| Cohorts | n | Samples | Date | Area | COVID-19 |
| Pre-pandemic individuals |
491 | 491 | 2017–2019 | France | Naïve |
| Hospitalized patients with COVID-19 |
51 | 161 | January to March 2020 | Paris, France | Confirmed |
| Mildly symptomatic individuals |
209 | 209 | 3–4 March 2020 | Crépy-en-Vallois, France | Suspected |
| Healthy blood donors | 200 | 200 | 20–24 March 2020 | Lille, France | Unknown |
