This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'a 70 year old women refused to take influenza vaccine , dveloped flu. death happend 1 week after pneumonia.most common cause of post influenza pneumonia \nSelect and explain. \nA. staphyloccocus aureus, B. measles, C. legionella, D. cmv', 'role': 'user'}, {'content': 'Answer: A \nExplanation: m/c organism in post influenza decondary pneumonia is staph .auerus Staphylococcus aureus pneumonia * S. aureus is an impoant cause of secondary bacterial pneumonia in children and healthy adults after viral respiratory illnesses (e.g., measles in children and influenza in both children and adults). * Staphylococcal pneumonia is associated with a high incidence of complications, such as lung abscess and empyema. * Staphylococcal pneumonia occurring in association with right-sided staphylococcal endocarditis is a serious complication of intravenous drug abuse. ref : ananthanaryana 9th ed', 'role': 'assistant'}]