Health experts are debating whether vaping could be banned following fears underage smokers are becoming addicted.

The US Food and Drug Administration (FDA) is now warning that if the trend continues there could be an outright ban.

The FDA’s commissioner, Scott Gottlieb, said: “I’ll tell you this. If the youth use continues to rise, and we see significant increases in use in 2019, on top of the dramatic rise in 2018, the entire category will face an existential threat.”