This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
Where was the last case of Smallpox occured? 
Select and explain. 
A. Somalia, B. Libya, C. Sudan, D. Uganda
A: Somalia
Answer: A: Somalia 
Explanation: The last naturally occurring case was diagnosed in October 1977 in Somalia and the World Health Organization ceified the global eradication of the disease in 1980.