... M.D.American Thoracic SocietyUniversity of South AlabamaMobile, ALNancy E. Dunlap, M.D.American College of Chest PhysiciansUniversity of Alabama at BirminghamBirmingham, ALWafaa M. El-Sadr, ... strain that was maintained at the University of Montreal (Montreal, Canada).Vaccine EfficacyReported rates of the protective efficacy of BCG vaccines might have been affectedby the methods and ... data from clinical trials and case-control studies of BCG2 MMWR April 26, 1996vaccination. These developments have prompted a re-evaluation of the role of BCGvaccination in the prevention and...