This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genital Tract Infections (Too hot to handle!), Subject name: Gynaecology & Obstetrics
[{'content': 'One day after a casual sexual encounter with a bisexual man recently diagnosed as antibody-positive for HIV, a patient is concerned about whether she may have become infected. A negative antibody titer is obtained. To test for seroconversion, when is the earliest you should reschedule repeat antibody testing after this sexual encounter? \nSelect and explain. \nA. 1 to 2 weeks, B. 16 to 20 weeks, C. 6 to 12 weeks, D. 12 to 15 weeks', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Persons at high risk for infection by human immunodeficiency virus (HIV) include homosexuals, bisexual males, women having sex with a bisexual or homosexual paner, intravenous drug users, and hemophiliacs. Antibody titer usually becomes positive 6 to 12 weeks after exposure, Because of occasional delayed appearance of the antibody after initial exposure, it is impoant to follow up patients for 1 year after exposure.', 'role': 'assistant'}]