Ninety-three people in Sweden, most of them children, have been diagnosed with narcolepsy since taking the swine flu vaccine Pandemrix last winter, according to figures from the Swedish Medical Products Agency (Läkemedelsverket).
According to the Swedish Association of Persons with Neurological Disabilities (Neurologiskt handikappades riksförbund - NHR), the agency is examining a further 135 cases involving children and will present its full findings later this summer.
Since August 2010, at least 12 countries have reported cases of narcolepsy, particularly among children and adolescents, after receiving a swine flu, or H1N1, vaccine.