References
- The National Archives and Records Administration, Government of US:
The deadly virus – Influenza epidemic of 1918. Available at :
https://www.archives.gov/exhibits/influenza-epidemic/ . Accessed
on 22 April 2020.
- World Health Organization: Bugs, drugs, smoke: Chapter 1 – Smallpox:
Eradicating an ancient scourge. Available at
https://www.who.int/about/bugs_drugs_smoke_chapter_1_smallpox.pdf.
Accessed on 22 April 2020.
- World Health Organization: Coronavirus disease (COVID-2019) situation
reports. Available at
https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports
. Accessed on 24 April 2020.
- World Health Organization: Managing Epidemics-Key facts about major
deadly diseases. Available at
https://www.who.int/emergencies/diseases/managing-epidemics-interactive.pdf
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