This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'Parvovirus infection which of the following is true \nSelect and explain. \nA. Erythroid progenitors are affected, B. Myeloid precursors are affected, C. People with P antigen is resistant to infection, D. Majority are chronic infections', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ref. Robbins Pathology. 9th edition. Page. 460\n\xa0\n\nParvovirus B19 directly infects eiythroid progenitors through the P antigen on erythroblast surface.\nIndividuals who lack P antigen are resistant to parvovirus infection.\nFew giant proerythroblasts (GFE) with basophilic cytoplasm 'dogear1 like cytoplasmic projections, stippled chromatin and inclusion like nucleoli are characteristic and diagnostic of parvovirus BI9 infection\nParvovirus B19 infection usually remits spontaneously though few cases may require I/V Ig therapy", 'role': 'assistant'}]