Table 1. Trial cohorts.
| Group | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| N * | 16 | 19 | 20 | 17 |
| Dose (PFU) | 106 | 107 | 107 | 107 |
| Mean age (range years) | 36 (20–51) | 36 (25–53) | 33 (19–49) | 14 (12–17) |
| Male/female | 9/7 | 11/8 | 10/10 | 7/10 |
| Race/ethnicity | ||||
| White | 14 | 11 | 12 | 13 |
| Non-white | 2 | 8 | 8 | 4 |
| Withdraw number | 3 | 4 | 3 | 0 |
| Withdraw window (days) | 86–352 | 8–365 | 261–274 | N/A |
| Mean days of follow-up† | 335 | 220 | 261 | 181 |
*A total of 72 participants failed screening.
†One participant in group 2 was excluded because of study dropout at day 8, and one participant in group 3 was excluded for COVID-19 positive diagnosis at day 4.