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[ edit ] Vaccination schedule A child receives oral polio vaccine. Following the widespread use of poliovirus vaccine in the mid-1950s, the incidence of poliomyelitis declined rapidly in many industrialized countries. As the incidence of wild polio diminishes, nations transition from use of the oral vaccine back to the injected vaccine because the risk of ...

Two polio vaccines are used throughout the world to combat polio . The first was developed by Jonas Salk , first tested in 1952 , and announced to the world by Salk on April 12 , 1955 . It consists of an injected dose of inactivated (dead) poliovirus . The second was an oral vaccine developed by Albert Sabin using attenuated poliovirus that he had received from Hilary ...