Scar size and effectiveness of Bacillus Calmette Guerin (BCG) vaccination in the prevention of tuberculosis and leprosy: a case-control study.

Background: The study was undertaken to estimate the effectiveness of BCG vaccination in relation to scar size in the prevention of tuberculosis and leprosy.

Methods: The present study was designed as hospital-based pair-matched case-control study and was carried out at Government Medical College Hospital, Nagpur, Maharashtra, India. It included 877 cases of tuberculosis and 292 cases of leprosy (diagnosed by WHO criteria), born onwards 1962.