As of next month, use of e-cigarettes in public transport in Switzerland will be banned.

The regulation against smoking tobacco on public transport was extended to electronic cigarettes due to the difficulty of inspectors to distinguish between cigarettes and e-cigarettes.
Swiss regulations do not allow the sale of electronic cigarettes, but their use in the country is tolerated and the federal public health agency has noted an increase in their use.
There are currently no regulations in Switzerland governing their use in restaurants.
Some 250 scientists, experts, policymakers and industry figures gathered in Britain on Tuesday to discuss the health and public health issues surrounding e-cigarettes, which many argue are much less harmful than smoking tobacco.
Source-AFP