Effect of revaccination with BCG in early childhood on mortality: randomised trial in Guinea-Bissau.

Objective: To determine whether BCG revaccination at 19 months of age reduces overall child mortality.

Design: Randomised trial, with follow-up to age 5.

Setting: A health project in Bissau, Guinea-Bissau, which maintains a health and demographic surveillance system in an urban area with 90 000 inhabitants.