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
[{'content': 'True about varicella vaccine is ? \nSelect and explain. \nA. Poorly immunogenic, B. Duration 4-6 months, C. Avoid salicylates for 4-6 weeks, D. Given to child< 12 months when they do not have chicken pox', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Avoid salicylates for 4-6 weeks A live attenuated varicella virus vaccine is safe and currently recommended between 12-18 months of age who have not had chicken pox.The vaccine is very immunogenic, sero-conversion occurs in 95% of children after a single dose.A duration of immunity is not known, but is probably 10 years.", 'role': 'assistant'}]