Table 3 Efficacy of BCG against severe COVID-19 by age group, Brazil, 2020–2021
From: Previous BCG vaccination is associated with less severe clinical progression of COVID-19
Age group | 0–60 | 0–30 | 31–40 | 41–50 | 51–60 | 61+ |
|---|---|---|---|---|---|---|
Eficacy (95% CI)a | 87.0% (74.1–93.1%) | 97.1% (25.4–99.9%) | 90.0% (21.2–98.7%) | 84.0% (42.6–95.3%) | 81.0% (48.2–92.7%) | 35.0% (− 44.4–70.7%) |