This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'A 19-year-old college student develops a rash. She works pa-time in a pediatric AIDS clinic. Her blood is drawn and tested for specific antibody to the chickenpox virus (varicella-zoster). Which of the following antibody classes would you expect to find if she is immune to chickenpox? \nSelect and explain. \nA. IgA, B. IgG, C. IgM, D. IgD', 'role': 'user'}, {'content': "Answer: B \nExplanation: The initial response to a new infection is with an IgM class antibody. IgM develops quickly and usually disappears within a few months. The secondary response is IgG and reflects the patient's immune status or, in the case of chickenpox, a vaccination given. Reference: Ananthanarayan and Paniker&;s Textbook of Microbiology Tenth edition", 'role': 'assistant'}]