We are cautious as to note that, in the current study, animal models are not completely replicate models of human cigarette smoking
Exposure to these microbial toxins has been associated with myriad health problems in humans. Other side effects linked to e-cigs include seizures, asthma, and lung function, inflammation problems

US regulators probe reports of e-cigarette use causing seizures US regulators said Wednesday they are investigating reports that e-cigarettes -- increasingly widespread in America and elsewhere -- may cause seizures."We have reports indicating that some people who use e-cigarettes, especially youth and young adults, are experiencing seizures following their use," the Food and Drug Administration (FDA) said in a statement.The FDA has reviewed "voluntary adverse event reports," finding "a total of 35 reported cases of seizures following use of e-cigarettes between 2010 and early 2019," it said."We believe these 35 cases warrant scientific investigation into whether there is in fact a connection." The use of e-cigarettes -- colloquially known as vaping -- began to take off among young Americans in the 2010s, and overtook cigarette smoking in 2014.The US categorizes e-cigarettes -- which deliver nicotine, often as part of fruit or sweets-flavored vapor -- as tobacco products, a definition not shared by all countries.The use of e-cigarettes -- colloquially known as vaping -- began to take off among young Americans in the 2010s, and overtook cigarette smoking in 2014Charts showing the prevalence of e-cigarettes and conventional cigarettes in the US high schools

Thus, custom cigarette box sizes are tailored for them
Thunder Boy 1: Yeah
Both styles essentially mimic the sensation of smoking by delivering a flavoured nicotine vapour that you can inhale like a cigarette