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: Social & Preventive Medicine
A convalescent case of cholera remains infective for 
Select and explain. 
A. 14-21 days, B. 7-14 days, C. < 7 days, D. 21-28 days
A: 14-21 days
Answer: A: 14-21 days 
Explanation: Types of carriers in Cholera: