"This is part of a paper that will be submitted to the parties of the WHO Framework Convention on Tobacco Control later this year.

"We are also working with national regulatory bodies to look at regulatory options, as well as toxicology experts, to understand more about the possible impact of e-cigarettes and similar devices on health."

'Great caution'
The British Medical Association wants stronger regulation of the devices in the UK.

The Welsh government wants to restrict the use of e-cigarettes in enclosed public places, because of concerns that they normalise smoking purple solitude air.

Prof John Ashton, president of the Faculty of Public Health, said: "We need to weigh up the benefits of fewer people smoking against the risk of electronic cigarettes leading to more people starting to smoke, particularly children dark night singer lemon."

Prof Martin McKee, of the London School of Hygiene and Tropical Medicine, said: "The health community is completely divided on the subject of whether electronic cigarettes are safer than real cigarettes wuyuna.

"While the signatories to this letter are clearly supportive, the World Health Organization, correctly, bases its decisions on the best available evidence GREEN FLOWER LAUGH.

"It has commissioned an extremely comprehensive independent report, subsequently published in summary form in the prestigious academic journal Circulation, that urges great caution, questioning just how safe these products are and raising serious concerns about how their marketing may undermine the substantial progress that has been made with tobacco control in recent decades - a view supported by a recent report from the US Senate Smile go away.

"Until these issues are resolved, it would be premature to encourage their wider use Single Club."