chewing tobacco and cancer statistics Trends in the Incidence Mortality of Tobacco-Related Cancers Among Adults in the United States File:Tobacco cancer.png - Wikimedia Commons

Smokers were using the EC in a similar puffing pattern as tobacco cigarettes, taking shorter puffs compared to experienced users

From 1953 forward, we know from industry documents that an organized campaign was sustained to create doubt around the scientific evidence on smoking and health, a strategy now widely used and referred to as the tobacco industry playbook. Other industries have turned to that playbook to counter scientific evidence that their products pose risks to human health and the environment

This source is documented in more detail in this background article which provides information on the scope of the data, its legal basis, the methodology employed, as well as related concepts and definitions

Arch Dermatol 1992