For which of the following diseases first successful vaccination was devloped (it is caused by Variola virus)?
Q. For which of the following diseases first successful vaccination was devloped (it is caused by Variola virus)?
Answer: Small pox
Notes: Smallpox was an infectious disease caused by one of two virus variants, Variola major and Variola minor. the World Health Organization (WHO) certified the global eradication of the disease in 1980.

 

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