The United States, South Korea and Singapore regard E-cigarettes as tobacco under control (see Table 1). The European Union implements classified control on E-cigarettes. The Tobacco Products Directive (TPD) stipulates that E-cigarettes containing nicotine will be included in the control range from May 2016. There are also differences between countries. In Korea, Togo and other countries, E-cigarettes containing nicotine are regarded as tobacco, while in Lithuania, Malta, Thailand, Vietnam and other countries, E-cigarettes are generally regarded as tobacco.