IQOS is a smokeless tobacco heating system developed by Philipp Morris International. It is an alternative to classic cigarette smoking. According to the manufacturers, smoking IQOS is significantly less harmful than smoking cigarettes. It is assumed that the absence of the combustion process does not lead to the release of carcinogens. However, independent experts disagreed with experts from Philip Morris. At the moment, there is a global dispute on the topic of harm from IQOS.