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When was the polio vaccine developed by Jonas Sulk proven effective?
How was the polio vaccine created?
Who first discovered the polio vaccine?
When did salk make a vaccine for polio?
How many people have been infected with polio?
When did polio first appear?
When is the date for pulse polio in the year may 2010?
Is polio contageous?
How old was Wilma Rudolph when she got polio?
Why did the polio vaccine work?
Why did Albert Sabin make a polio vaccine after jonas salk already made one?
How is polio spred?
How did people deal with polio?
How does polio affect the human body?
Who overcame the impediment of polio to serve four terms as president?
What is the infectious agent that causes polio?
Is polio is a heriditary disease and if not why?
Where is polio found today?
How do you avoid polio?
What organs does polio effect?
What does the polio virus attack?
Can polio kill you?
What is the vector for polio?
When was the first case of polio?
Is polio fatal?
How long does your drinks have to be thickened in hospital after being in a medical coma for 4 weeks?
What body part does bulbar polio attack?
How many people are living with polio?
Who discovered poliomyelitis?
When did Jonas Salk invent a cure for polio?
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