This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
The characteristics of polio vaccine are all except - 
Select and explain. 
A. Maintenance of cold chain, B. 100% immunisation, C. Killed vaccine is effective in India, D. 5 doses of OPV given
B: 100% immunisation
Answer: B: 100% immunisation 
Explanation: Park&;s Textbook of Preventive and Social Medicine 23rd edition Page no: 206, 207 After 3 doses of OPV, the mean propoion of infants with detectable serum neutralizing antibody level was only 73% for type1, 90% for type 2 and 70% for type 3 polio virus