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Why Some Polio Immunizations Fails

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Why Some Polio Immunizations Fails

Global Health

Why Some Polio Immunizations Fails

Why Some Polio Immunizations Fails

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  • <iframe src="https://www.npr.org/player/embed/4598151/4598152" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

Fighting Polio

Read about Dr. Jonas Salk's vaccine and see a timeline of the fight against polio.

Fifty years ago after the development of a polio vaccine, the World Health Organization is still trying to eradicate the disease. But there are doubts that mass immunization campaigns are the most effective approach. In the second story in a series marking the polio vaccine anniversary, a look at why some polio immunization programs fail.