A Martínez talks to University of San Francisco data scientist Jeremy Howard about what masks -- homemade or otherwise -- do to protect ourselves and others from disease.

(Photo courtesy of Flo Spiegel)

A Martínez talks to University of San Francisco data scientist Jeremy Howard about what masks -- homemade or otherwise -- do to protect ourselves and others from disease. (Photo courtesy of Flo Spiegel)

Why You Should Wear A Mask

<p>Join Take Two hosted by A Martinez each weekday when we’ll translate the day’s headlines for Southern California, making sense of the news and cultural events that people are talking about.</p>

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Join Take Two hosted by A Martinez each weekday when we’ll translate the day’s headlines for Southern California, making sense of the news and cultural events that people are talking about.

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Why You Should Wear A Mask

Why You Should Wear A Mask