REFERENCES:

• https://www.cdc.gov/smallpox/index.html

• Stefan Riedel. ‘Edward Jenner and the history of smallpox and vaccination’, Proc (Bayl Univ Med Cent). 18(1) [online] Available at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1200696/ (Accessed: 27 February 2019)

• Noraini P, Timothy W, Daisy Varitha John. ‘Diagnosis of TB Meningitis: Challenges and Promises’, Malaysian J Pathol. 37(1) [online] Available at: http://www.mjpath.org.my/2015/v37n1/tuberculous-meningitis.pdf (Accessed: 3 March 2019)

• The College of Physicians of Philadelphia. The History of Vaccines [Online]. Available at: https://www.historyofvaccines.org/timeline#EVT_17 (Accessed: 27 February 2019)

• https://www.cdc.gov/tb/publications/factsheets/prevention/bcg.htm

• Mei Ling Sharon Tai. ‘Tuberculous Meningitis: Diagnostic and Radiological Features, Pathogenesis and Biomarkers’, Neuroscience and Medicine. 101-107 (4) [online] Available at: https://umexpert.um.edu.my/file/publication/00011841_115608.pdf (Accessed: 5 March 2019)