NPR's Alex Chadwick talks to NPR's Ira Flatow, host of Talk of the Nation Science Friday, about a new method for preserving and storing vaccines that could help millions of people in developing countries.
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Alex Chadwick
For more than 30 years, Alex Chadwick has been bringing the world to NPR listeners as an NPR News producer, program host and currently senior correspondent. He's reported from every continent except Antarctica.
Ira Flatow