41. A 25-year-old woman has had fever, joint pain and tenderness, and a faint macular rash for 5 days. Results of serologic testing are shown: At first visit 6 weeks later Parvovirus IgM <1:10 <1:10 Parvovirus IgG 1:256 1:512 Which of the following is the best interpretation of these results? CA) The acute illness was due to parvovirus OB) A parvovirus infection has blunted the patient's immune responsiveness OC) The patient has a chronic parvovirus infection OD) The patient has IgM deficiency E) The patient had parvovirus infection sometime prior to the acute illness

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