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
Chemoprophylaxis is indicated for all of the following except: 
Select and explain. 
A. Cholera, B. Measles, C. Meningococcal meningitis, D. Conjunctivitis87. Under the school vision screening
B: Measles
Answer: B: Measles 
Explanation: Ans. b. Measles