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': 'Elevated IgG and IgM antibody titers to parvovirus suggest a diagnosis of \nSelect and explain. \nA. Fifth disease, B. Susceptibility to chickenpox, C. Possible subacute sclerosing panencephalitis (SSPE), D. Possible hepatitis B infection', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Fifth disease is a viral exanthem commonly seen in children 8 to 12 years old. Children are ill for a few days but recover without incident. Unfortunately, if a pregnant female acquires the disease in the first trimester of pregnancy, the fetus is at risk. The causative agent is thought to be a parvovirus (parvovirus B 19).', 'role': 'assistant'}]