Maternal Bacille Calmette-Guérin Scars and Mortality Risk for Male and Female Newborns: Observational Study From Guinea-Bissau.

Background: Maternal priming with bacille Calmette-Guérin (BCG) has been associated with reduced mortality in male offspring. We investigated this association in a cohort of healthy BCG-vaccinated neonates.

Methods: This observational study within a randomized controlled trial comparing different BCG strains was conducted in Guinea-Bissau from 2017 to 2020.