Polio was once a scourge upon the world but through the selflessness of one individual, Jonas Salk, polio is on its way to being pages in a history book.
The Polio Vaccine and Jonas Salk: Earn Billions or Save Millions?
Tag: health
Polio was once a scourge upon the world but through the selflessness of one individual, Jonas Salk, polio is on its way to being pages in a history book.
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