An instructor at Fort Leonard Wood, Mo., carries VX nerve agent inside a special chamber used for training in 2003. Brendan Smialowski/Getty Images hide caption

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Brendan Smialowski/Getty Images

The Two-Way

VX: The Nerve Agent Used To Kill Kim Jong Nam Is Rare And Deadly

A colorless, odorless liquid, similar in consistency to motor oil, VX kills in tiny quantities that can be absorbed through the skin. It is among the deadliest chemical weapons ever devised.

Nancy Roach at a conference in 2016. She's long worked as a patient's advocate and recently teamed up with scientists to help improve the design of studies, as well as to improve clinical care. Andrew Wortmann/Courtesy of Fight Colorectal Cancer hide caption

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Andrew Wortmann/Courtesy of Fight Colorectal Cancer

Advice From Patients On A Study's Design Makes For Better Science

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