A hazardous flavoring chemical linked to an acute respiratory illness has been found in many flavored electronic cigarettes.  The chemical is known as diacetyl.   This bronchiolitis is an irreversible lung disease.  Flavors such as “Cupcake”, “Fruit Squirts” & more.  E-Cigarettes are NOT regulated by the Food and Drug  Administration, meaning health risks are unknown at this time.  Bearing this in mind, how SAFE is the “HARMLESS”  ALTERNATIVE  to cigarette smoking?  This according to the Harvard T.H. Chan School of Public Health.