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
The number of doses recommended for oral Ty21a typhoid vaccine is: 
Select and explain. 
A. 14, B. 5, C. 3, D. 1
C: 3
Answer: C: 3 
Explanation: The Ty21a vaccine is licensed for use in individuals > 5 years. A three dose regimen is recommended. Vaccine is administered on alternate days: 0n days 1, 3 and 5. Ref: Park 21st edition, page 215.