Oral polio vaccine: Aka sabin vaccine. The oral polio vaccine is no longer used in the United States. U.S. Now exclusively uses salk inactivated (killed) polio vaccine.
Answered 10/2/2019
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Early oral vaccine: The oral polio vaccine first broadly uses in the us in the 1960's.It was common to have large community events where the OPV drops were placed on a sugar cube & given to a recipient. With 1 case of OPV associated polio/2.4 million doses, the OPV was replaced in 1998 by an injected vaccine which has no associated cases. The oral preparation is still used in some parts of the world.
Answered 11/4/2019
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