E-cigarettes have the potential to save "hundreds of millions of lives" by cutting smoking rates, a group of scientists have claimed in a letter to the World Health Organisation.
The experts want to make sure e-cigarettes are not classified in the same way as tobacco products such as cigarettes.
Such a move could lead to restrictive measures including higher taxes, bans on e-cigarette advertising and restrictions on their use in public places.
Their letter reads: "These products could be among the most significant health innovations of the 21st century - perhaps saving hundreds of millions of lives. The urge to control and suppress them as tobacco products should be resisted."
More top news
What would the Colonel say? KFC been forced to shut a number of its outlets across the UK after running out of chicken.
As tuition fees in England continue to prove to be among the most experience in the world, we look at how they compare to other nations.