sentences:  The Institute for Global Tobacco Control (IGTC) has identified 68 countries that have laws regulating e-cigarettes, as at November 2016.Types of regulation include complete prohibition on the sale and marketing of e-cigarettes, prohibition on their use in enclosed public places, minimum age for purchase, an allowance for e-cigarettes to be sold under general consumer product regulations and most recently, in the UK, e-cigarettes may be brought to market as either medicines or consumer products (with those seeking medicines approval undergoing the standard medicines licensing process).The World Health Organization acknowledge that e-cigarettes may play a role in harm reduction strategies, but should be regulated to minimize any potential risks.