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': 'Chicken pox vaccine is - \nSelect and explain. \nA. Live vaccine, B. Killed vaccine, C. Conjugated vaccine, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Prevention of chickenpox\n\nFor prevention of chickenpox, following are used-\n\ni)\xa0\xa0\xa0 Varicella zoster immunoglobulin (VZIG)\n\nVZIG is given within 72 hours of exposure in exposed susceptible individuals.\nIt is given intramuscularly with a repeat dose in 3 weeks.\nBecause VZIG bind to the varicella vaccine, the two should not be given concomitantly.\n\nii) Vaccine\n\nVaricella vaccine is a live attenuated vaccine and is recommended for children between 12-18 months of age.\nEfficacy of vaccine is 90 - 95% and the duration of immunity is probably 10 years.\nTwo doses are recommended in person older than 12 years of age.', 'role': 'assistant'}]