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COVID-19 antibody on follow-up in both groups (n = 495)
| Follow-up time | COVID antibody positivity (BCG group) (%) | COVID antibody positivity (placebo group) (%) | p value |
|---|---|---|---|
| Baseline | 0 | 0 | NC |
| 3 months | 54 | 62 | 0.10 |
| 6 months | 72 | 84 | 0.003 |
| 9 months | 81.2 | 89.5 | 0.04 |
NC not calculated owing to no events
