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': 'Window period in HIV infection ? \nSelect and explain. \nA. 1-2 weeks, B. 4-8 weeks, C. 8-12 weeks, D. > 12 weeks', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b ' i.e., 4-8 weeks Window period It takes 2-8 weeks to months for antibodies to appear after infection. This period, from infection to appearance of antibodies, is called as window period. During this period patients is seronegative i.e. serological tests (ELISA and Western blot) are negative. o The individual may be highly infectious during this period.", 'role': 'assistant'}]