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: Microbiology
Live vaccine is ? 
Select and explain. 
A. Salk polio, B. KFD, C. Sabin polio, D. Meningococci
C: Sabin polio
Answer: C: Sabin polio 
Explanation: There are 4 main types of vaccines: Live-attenuated vaccines Inactivated vaccines Subunit, recombinant, polysaccharide, and conjugate vaccines Toxoid vaccines Live-attenuated vaccines Live vaccines use a weakened (or attenuated) form of the germ that causes a disease.