Number of subjects with history of positive PCR test by seropositivity at phase I
Seropositivity at phase I | SARS-CoV-2 infection reported (PCR) | |||
Prior first BS | Between first and second BS | Never | Total | |
No | 1080 | 1009 | 9263 | 11 352 |
Yes | 6397 | 95 | 4286 | 10 778 |
Total | 7477 | 1104 | 13 549 | 22 130 |
BS, blood sample.