This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Human Immunodeficiency Virus, Subject name: Microbiology
[{'content': 'HIV primarily infects? \nSelect and explain. \nA. CD4* cells, B. CD8+ cells, C. NK cells, D. All of these', 'role': 'user'}, {'content': "Answer: A \nExplanation: ANSWER: (A) CD4+ cellsREF: Jawetz, Melnick, & Adelberg's Medical Microbiology, 24TH edition Chapter 44Repeat Microbiology December 2010", 'role': 'assistant'}]