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
Mass chemoprophylaxis in endemic area is recommended for all of the following, except - 
Select and explain. 
A. Yaws, B. Leprosy, C. Trachoma, D. Filaria
B: Leprosy
Answer: B: Leprosy 
Explanation: None