Vaping: How healthy is it?

[Fox 9 KMSP-TV, March 02, 2017] Proponents of vaping, the smokeless alternative to cigarettes, say it safer than smoking and may be helpful in quitting smoking. But how safe is it? Allina Health pulmonologist, Dr. Andrew Stiehm, talked with Fox 9 News about what we know about vaping, especially for teens.

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