Loose lips sink ships (and try not to get syphilis): when altruism meets artillery.

Part one of today's episode of Viral is about public health and propaganda. Later, we talk to Jennifer Wright, author of the new book "Get Well Soon: History's Worst Plagues and the Heroes Who Fought Them."

Edited and produced by Linsey Grove and Quinn Lundquist. James Schultz is our technical wizard. For more info, visit viral-pod.com and check us out on Twitter @viralpodcast.

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Intro/outro music: "Take Your Medicine" by the Quick and Easy Boys