For best results, choose a unit with strong particle filtration and activated carbon or odor-control filtration, especially in spaces where smoke is frequent or heavy
| National Institute on Drug Abuse (NIDA)
Signs must include the depiction of a pack of cigarettes at least 2 inches high, defaced by a red diagonal diameter of a surrounding red circle, and the words Under 18. Signs must contain red lettering at least inch high on white background which states: IT IS A VIOLATION OF STATE LAW FOR CIGARETTES, OTHER TOBACCO PRODUCTS, ALTERNATIVE NICOTINE PRODUCTS, OR VAPOR PRODUCTS, TO BE SOLD OR OTHERWISE PROVIDED TO ANY PERSON UNDER THE AGE OF EIGHTEEN OR FOR SUCH PERSON TO PURCHASE, ATTEMPT TO PURCHASE OR POSSESS CIGARETTES OTHER TOBACCO PRODUCTS, ALTERNATIVE TOBACCO PRODUCTS OR VAPOR PRODUCTS
Ravi Kalhan, MD, MS, of the Division of Pulmonary and Critical Care Medicine at Northwestern University Feinberg School of Medicine
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