Vaping products are taking a hit as health experts scramble to determine what's causing a mysterious lung disease.
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More than 500 people have gotten ill, and nine have died after smoking vapes.
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Vaping products have been one of the fastest-growing segments of the United States' legal marijuana industry. But the scare caused a 15% decline in market share for vapes.
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Industry analyst firm New Frontier Data says states like Oregon and New Mexico saw more than a 60% drop in vape market share.
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Experts say the crisis won't stop marijuana legalization but will mean tighter regulation overall.
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Public health officials haven't pinpointed any one substance or product that's to blame.
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Many patients say they used vapes containing marijuana oil, but some patients say they smoked nicotine-only vapes.
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