This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Convalescent case of cholera remains infective for \nSelect and explain. \nA. 10-14 days, B. 14-21 days, C. 7 days, D. Less than 7 days', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CONVALESCENT CARRIER of cholera The patient who has recovered from an attack of cholera may continue to excrete vibrios, during his convalescence for 2-3 weeks. Convalescent state has been found to occur in patients who have not received effective antibiotic treatment. The convalescent carriers can often become chronic or long-term carriers. Ref : Park 23rd edition Pgno : 230', 'role': 'assistant'}]