This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
Animal reservoir is seen in all except- 
Select and explain. 
A. Rabies, B. Yellow fever, C. Influenza, D. Measles
D: Measles
Answer: D: Measles 
Explanation: The only source of measles infection is a case of measles. Carriers are known to occur. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 160