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B
Small pox
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C
Poliomyelitis
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D
Both B and C
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Solution
The correct option is D Both B and C
Smallpox is believed to have first infected humans around the time of the earliest agricultural settlements some 12,000 years ago. The origin of smallpox is unknown. Smallpox is thought to date back to the Egyptian Empire around the 3rd century BCE (Before Common Era). Smallpox was an infectious disease caused by one of two virus variants, Variola major and Variola minor. The last naturally occurring case was diagnosed in October 1977 and the World Health Organization (WHO) certified the global eradication of the disease in 1980.
Polio also called poliomyelitis or infantile paralysis is an infectious disease caused by the poliovirus. Polio also called poliomyelitis or infantile paralysis is an infectious disease caused by the poliovirus.