A Look at How Mad Cow Disease Spreads NPR's Joanne Silberner explains how mad cow disease started and spread. The disease was considered a medical oddity in England when it was first observed in the 1980s. Veterinarians finally figured out the disease was spread by cows eating material from other cows.
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A Look at How Mad Cow Disease Spreads

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A Look at How Mad Cow Disease Spreads

A Look at How Mad Cow Disease Spreads

A Look at How Mad Cow Disease Spreads

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  • <iframe src="https://www.npr.org/player/embed/1571655/1571656" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

NPR's Joanne Silberner explains how mad cow disease started and spread. The disease was considered a medical oddity in England when it was first observed in the 1980s. Veterinarians finally figured out the disease was spread by cows eating material from other cows.

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