A group of 53 leading scientists has written to the World Health Organisation (WHO) urging the body not to classify e-cigarettes as tobacco products.
The experts say e-cigarettes are "part of the solution" in the fight against smoking-related diseases and their use should not be discouraged.
Leaked documents from a WHO meeting suggest the organisation sees e-cigarettes as a "threat" and wants them bracketed along with other products containing nicotine, including regular cigarettes.
More top news
Donald Trump gave the French president a helping hand in front of reporters during the first state visit of the Trump presidency.
Cloudy skies and feeling coller
Gospel choir and classical soloists feature among the performers at the ceremony at Windsor Castle.