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: Microbiology
[{'content': 'Antenatal maternal HIV diagnosis is of importance in - \nSelect and explain. \nA. To prevent vertical transmission, B. To terminate, C. To discharge, D. To isolate the patient', 'role': 'user'}, {'content': 'Answer: A \nExplanation: HIV infection can be transmitted from an infected mother to her fetus during pregnancy, during delivery, or by breastfeeding.\nThe relative proportions of mother-to-child transmissions were 23–30% before birth, 50–65% during birth, and 12–20%\xa0via breastfeeding.\nTreatment of an HIV-infected mother with nevirapine during pregnancy and the infant during the first weeks following\xa0birth has proved very effective in dramatically decreasing mother-to-child transmission of HIV', 'role': 'assistant'}]