Introducing the Pioneer of the polio vaccine, Jonas Salk.Heroes of Progress is an outstanding Series created by HumanProgress.org by author Alexander C Hammond.Check out the rest of the Heroes of Progress by subscribing or going to the playlist: https://www.youtube.com/playlist?list=PLyxK8N8FZsA02jnZKolX6Et7MBduqg8n4You can find the source content here: https://humanprogress.org/article.php?p=1564Truth + Character + Wisdom = Prosperity.*******************************************************************WHERE YOU CAN LISTEN TO/READ MY CONTENT:► TruthSeeker Newsletter- http://bit.ly/ohytruthseeker► PODCAST: SPREAKER- https://www.spreaker.com/show/oh-hale-yeah► PODCAST: iTunes - http://bit.ly/ohysubscribe► PODCAST: Google - http://bit.ly/OHYGoogle► QUORA - https://goo.gl/31USZa► MEDIUM - https://goo.gl/fMTWZR► TWITTER- https://goo.gl/85RFf2► PAYPAL- www.paypal.me/OHHALEYEAH► SUBSCRIBE - https://www.youtube.com/c/OhHaleYEAH********************************************************************All footage taken falls under ''fair use'' of the Digital Millennium Copyright Act (1998). Therefore, no breach of privacy or copyright has been committed. Freedom of speech is the ability to speak without censorship.***************

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