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The main substances making up in the liquid in the e-cigarettes are nicotine, propylene glycol, glycerin and some flavors or smells

Researchers from UCLA, Boston University, and the University of Texas so far found that certain cells exposed to e-cigarette vapor showed similar genetic changes as cells exposed to conventional cigarette smoke

However, they have sparked debate among lawmakers and public health advocates

"With these warnings, every person who picks up a pack of cigarettes is going to know exactly what risk they're taking," Health and Human Services Secretary Kathleen Sebelius told reporters

Michigan's first cigarette tax, Public Act 265, was enacted during the final hours of the legislative session in June 1947 for the purpose of paying soldier bonuses, and took effect on July 1 that same year.[35] The Legislature had previously passed a cigarette tax, but it was rejected by the voters