This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Pediatrics
[{'content': 'Splenectomy can be performed after immunization against which of the following organisms: \nSelect and explain. \nA. Haemophilus influenza, B. Streptococcal pneumonia, C. Neisseria meningitides, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. All of the aboveSplenectomy is usually performed after 6 years of age following immunizations against H influenza type b, streptococcal pneumonia and Neisseria meningitides. Post splenectomy patients receive penicillin prophylaxis to prevent sepsis usually up to adulthood.', 'role': 'assistant'}]