Video: 'Jonas Salk Polio Vaccine Discovery Public Domain Newsreel PublicDomainFootage.com'
(Tuesday, April 12, 1955) — The Salk vaccine against polio, an infectious disease caused by the poliovirus, was declared safe and effective today.
Video: 'Jonas Salk Polio Vaccine Discovery Public Domain Newsreel PublicDomainFootage.com'
(Tuesday, April 12, 1955) — The Salk vaccine against polio, an infectious disease caused by the poliovirus, was declared safe and effective today.