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: Medicine
[{'content': 'Pneumococcal vaccine is given in - \nSelect and explain. \nA. HIV, B. Splenectomised patients, C. Sickle cell anemia, D. Coicosteroids therapy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bacterial pneumonia caused commonly by Streptococcus pneumonia is seen with increased incidence in HIV infected patients.So polysaccharide vaccine is used in HIV individuals who us in high risk of exposure. Reference Harrison20th edition pg 1056', 'role': 'assistant'}]