Swine flu vaccine and narcolepsy

In 2009, hundreds of teenagers’ lives were changed forever, when a vaccine designed to protect them against swine flu appeared to trigger a sleep disorder.

It affected people in various countries including Sweden.

Maddy Savage speaks to Christopher Tyvi from Stockholm, who is one of those who experienced problems.

A Bespoken Media production for BBC World Service.

(Photo: Swine flu vaccine. Credit: Getty Images)