Smallpox Fact Biosecurity Health Sciences & Medicine Literature review
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, Literature review
It is a disease that is unique in humans with no known animal or insect vectors and reservoirs ("Smallpox", 2005). It is extremely contagious, disfiguring, and often leads to death. The World Health Organization (WHO) in 1967 suggested that an estimate of 15 million people was infected with the disease with 2 million deaths that year (Veenema, Weinstein, & Alibek, 2006).