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
In a epidemic of poliomyelitis, the best way to stop spread is by - 
Select and explain. 
A. Injection of killed vaccine, B. OPV drops to all children, C. Isolation of cases, D. Chlorination of all wells
B: OPV drops to all children
Answer: B: OPV drops to all children 
Explanation: - within an epidemic area, OPV should be provided for all persons over 6 weeks of age who have not been completely immunised or whose immune status is unknown. - OPV offers herd immunity and this propey is used in controlling epidemic. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:208 <\p>