1. WHO. World Health Organization Global Tuberculosis Report 2020. Geneva: World Health Organization; 2020. Licence: CC BY-NC-SA 3.0 IGO.2020.
2. https://www.who.int/teams/health-product-and-policy-standards/standards-and-specifications/vaccines-quality/bcg. BCG Vaccine.
3. WHO. World Health Organization model list of essential medicines: 21st list 2019. Geneva: World Health Organization. hdl:10665/325771. 2019.
4. WHO. BCG vaccines: WHO position paper. Weekly Epidemiological Record. 8 (93): 73–96. 23 February 2018 Geneva, Switzerland2018.
5. The efficacy of bacillus Calmette-Guerin vaccination of newborns and infants in the prevention of tuberculosis: meta-analyses of the published literature;Colditz;Pediatrics,1995