What are polio vaccines?
Q: What are polio vaccines?
A: Polio vaccines are vaccines that prevent poliomyelitis (or polio).
Q: How many types of polio vaccines are used throughout the world?
A: Two types of polio vaccines are used throughout the world.
Q: Who developed the first type of polio vaccine and when was it first tested?
A: The first type of polio vaccine was developed by Jonas Salk and first tested in 1952.
Q: What is the first type of polio vaccine?
A: The first type of polio vaccine is an injection of inactivated (dead) poliovirus.
Q: Who developed the second type of polio vaccine and when was it licensed?
A: The second type of polio vaccine was developed by Albert Sabin, and it was licensed in 1962.
Q: What is an attenuated virus?
A: An attenuated virus is a much less harmful strain of the same virus.
Q: How much has the worldwide cases of polio dropped from 1988 to 2007?
A: The worldwide cases of polio have dropped from about 350,000 cases in 1988 to 1,652 cases in 2007.
