The Oral Polio Vaccine Can Go 'Feral,' But WHO Vows to Tame It

Image: April 1959: Bottles containing the polio vaccine. M. McKeown/Getty Images

npr.org - November 10th, 2015 - Jason Beaubien

The oral polio vaccine may go down in history as one of the most powerful public health tools of modern times. Developed by Albert Sabin in 1961, the vaccine is cheap, easy to administer and has pushed polio to the brink of extinction.

The joke is that if you can "count to two" you can vaccinate kids against polio.

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