OCD OCD

The teen protagonist in John Green's latest novel, Turtles All The Way Down, has a type of anxiety disorder that sends her into fearful "thought spirals" of bacterial infection and death. Jennifer Kerrigan hide caption

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Jennifer Kerrigan

For Novelist John Green, OCD Is Like An 'Invasive Weed' Inside His Mind

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Dogs may not wash their paws compulsively, but some humans and canines have similar genetic mutations that may influence obsessive behavior. Ute Grabowsky/Photothek via Getty Images hide caption

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Ute Grabowsky/Photothek via Getty Images

Listen to this 'Talk of the Nation' topic

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