In the clip above, you can hear more about the growing problem with e-cigarettes at Rödeby School.

The school has now acted and sent out emails to guardians urging them to talk to the children about the risks of e-cigarettes.

- It is important that guardians receive this information so that they can discuss it at home, says Åsa Lindén Bengtsson, principal at Rödeby School.

In the clip below, you hear Umeå researcher Linnea Hedman about the risks of e-cigarettes and the increasing use of them among young people.

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"Affects vessels and airways" - the researcher hears about the risks of vaping Photo: Anna Bergman SVT / Anders Alm.