This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following statements is true regarding peusis? \nSelect and explain. \nA. Neurological complication rate of DPT is I in 50000, B. Vaccine efficay is more than 95%, C. Erythromycin prevents spread of disease between children, D. The degree of polymorphonuclear Leukocytosis correlates with the severity of cough', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Neurological complications of DPT vaccine is due to peussis component. The estimated risk is 1: 170000 doses administered. Vaccine efficacy is 85%. Although several antibiotics are effective against B.peussis, erythromycin is the drug of choice Reference : Park&;s Textbook of preventive and social medicine, 24th edition.Pg no.174', 'role': 'assistant'}]