San Francisco has become the first US city to ban e‑cigarette sales until their health effects are clearer.
They voted to ban stores selling the vaporisers and made it illegal for online retailers to deliver to addresses in the city.
The California city is home to Juul Labs, the most popular e‑cigarette producer in the US.
Juul said the move would drive smokers back to cigarettes and "create a thriving black market".
BBC
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