Is IQOS, a smoke-free cigarette alternative, safe?

Regulators from the FDA will consider a potentially safer alternative to cigarettes. Philip Morris International, the maker of Marlboro and other top brands, wants the FDA to approve IQOS, a pen-like product that warms tobacco and creates an aerosol that's less toxic than cigarette smoke. Smoking is the leading cause of preventable death in the U.S. Tony Dokoupil reports.

From: http://www.cbsnews.com/video/is-iqos-a-smoke-free-cigarette-alternative-safe/