Smoking is the biggest cause of preventable illness, killing more than 480,000 Americans every year, according to the Centers for Disease Control and Prevention
They can also dry up the mucus already present in your lungs and open up the airway passages
People who are experiencing clinical chronic health problems like asthma, chronic obstructive pulmonary disease (COPD) and bronchitis, are still having medical issues, despite switching from tobacco to e-cigarettes.
The number of cigarettes in a pack varies depending on the region, the cigarette brand, and the type of cigarette packaging
On 14 April 1994, the top executives of the seven biggest tobacco companies in the US appeared before the House Energy and Commerce Subcommittee on Health and the Environment, chaired by Henry Waxman of California