Researcher Penghui Zhao holds up the iNal patch, a wearable medical device that can prevent accidental opioid overdoses. (IMAGE)

Virginia Tech

Researcher Penghui Zhao holds up the iNal patch, a wearable medical device that can prevent accidental opioid overdoses.

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Researcher Penghui Zhao holds up the iNal patch, a wearable medical device that can prevent accidental opioid overdoses.

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Photo courtesy of Penghui Zhao.

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Photo courtesy of Penghui Zhao.

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