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
Certificate for vaccination during international travel is required in case of 
Select and explain. 
A. Japanese Encephalitis, B. Cholera, C. Yellow fever, D. Yellow severe and Cholera
C: Yellow fever
Answer: C: Yellow fever 
Explanation: None