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': 'In which of these condition is Post exposure prophylaxis not useful \nSelect and explain. \nA. Measles, B. Rabies, C. Peussis, D. Hepatitis B', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The merit of Hyperimmune globulin in peussis prohylaxis has yet to be established. So far there is no evidence of its efficacy in well-controlled trials. Post exposure prophylaxis of: H.influenza B: Rifampicin * 4 days Hepatitis A: Human normal Immunoglobulin Hepatitis B: Human specific Immunoglobulin Meningococcal meningitis: Rifampicin 600 mg BD * 2 days OR Meningococcal vaccine Rabies: Human normal Immunoglobulin + Vaccine Tetanus: Human normal Immunoglobulin + Vaccine Measles: Vaccine within 3 days. Ref: Park 25th edition Pgno: 174', 'role': 'assistant'}]