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
All of the following are killed vaccines, EXCEPT: 
Select and explain. 
A. Salk, B. Hepatitis B vaccine, C. 17-D Vaccine, D. HDCV
C: 17-D Vaccine
Answer: C: 17-D Vaccine 
Explanation: 17-D vaccine is a live attenuated vaccine used to control yellow fever. Killed vaccines are used to control typhoid, cholera, peusis, plague, rabies, salk (polio), influenza, hepatitis A, B, japanese encephaltis and KFD. Ref: Park's Textbook Of Preventive and Social Medicine 20th edition page 98.