This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
International disease surveillance is for 
Select and explain. 
A. Hepatitis, B. TB, C. Polio, D. Leprosy
C: Polio
Answer: C: Polio 
Explanation: Diseases under WHO surveillance 

Polio
Rabies
Relapsing fever
Influenza
Salmonella
Malaria
Louse born typhus