Anti-swine flu vaccination linked to increased risk of narcolepsy in young adults

January 21, 2014

Pandemrix is an influenza vaccination, created in 2009 to combat H1N1, known as Swine Flu. Now, a team of Swedish clinicians testing the vaccine for links to immune-related or neurological diseases have linked Pandemrix to an increased risk of narcolepsy in young adults.

Using a population-based prospective cohort study, the team analyzed data from regional vaccination registries and national health registries, covering seven healthcare regions and 61% of the Swedish population.

While the team did not identify any link to a large number of immune-related or , they did confirm an increased risk in diagnosis of narcolepsy in individuals younger than 20 years of age, and observed a trend towards an increased risk amongst young adults between 21 and 30.

"The follow-up of Pandemrix vaccinations in a large registry based study in Sweden confirms an increased risk of narcolepsy in children and adolescents, while also providing reassuring results for a large number of other neurological and immune related diseases," said Dr. I. Persson from the Karolinska Institutet, Stockholm.

Explore further: Flu vaccine also linked to narcolepsy in adults, study reports

More information: I. Persson, F. Granath, J. Askling, J. F. Ludvigsson, T. Olsson, N. Feltelius, 'Risks of neurological and immune-related diseases, including narcolepsy, after vaccination with Pandemrix: a population- and registry-based cohort study with over 2 years of follow-up', Journal of Internal Medicine, DOI: 10.1111/joim.1215

Related Stories

Flu vaccine linked to narcolepsy in under 30s: study

March 26, 2013

A vaccine used in Sweden in the 2009-2010 "swine flu" pandemic is linked to a higher risk of the sleeping disorder narcolepsy among under 30s, and not just children and teens as previously thought, a Swedish study showed ...

Swine flu vaccine linked to child narcolepsy: EU watchdog

September 21, 2012

A swine flu vaccine used in 2009-10 is linked to a higher risk of the sleeping disorder narcolepsy in children and teens in Sweden and Finland, the European Centre for Disease Prevention and Control said Friday.

Recommended for you

Researchers discover rare flu-thwarting mutation

September 29, 2016

A rare and improbable mutation in a protein encoded by an influenza virus renders the virus defenseless against the body's immune system. This University of Rochester Medical Center discovery could provide a new strategy ...

Utah man may have contracted Zika from dying father's tears

September 29, 2016

A Utah man who mysteriously contracted Zika from his infected father may have got it by touching his dad's tears or sweat with his bare hands, according to new research unveiled Wednesday that found the unusual transmission ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.