<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: The number of doses recommended for oral Ty21a typhoid vaccine is:
Options:
A. 14
B. 5
C. 3
D. 1
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is 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.<|im_end|>
