This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Principles of Immunization and Vaccination, Subject name: Social & Preventive Medicine
[{'content': 'Yellow fever vaccination becomes effective after how many days of vaccination: \nSelect and explain. \nA. 5 days, B. 10 days, C. 10 weeks, D. 10 months', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) 10 daysRef : K. Park 23rd ed. /121, 283* Yellow fever vaccine certificate becomes valid after 10 days of vaccination.* Duration of yellow fever vaccination coverage: 10 days- 10 years.* Quarantine period of yellow fever: 6 days (maximum I.P of YF)', 'role': 'assistant'}]