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Narcolepsy and H1N1 vaccination: a link?
Simon Thebault1, Angela Vincent, Paul Gringras
1aNeuroimmunology Group, Nuffield Department of Clinical Neurosciences, Oxford University, Oxford bPaediatric Sleep Medicine Department, Evelina London and Kings College London, London, UK.
Current Opinion in Pulmonary Medicine
|September 20, 2013
Summary
A swine flu vaccine (H1N1) has been strongly linked to a significant rise in childhood narcolepsy with cataplexy. Further research is needed to confirm the autoimmune link and understand if the vaccine hastens or causes the condition.
Area of Science:
- Neuroscience
- Immunology
- Epidemiology
Background:
- European countries observed a surge in narcolepsy with cataplexy among children post-H1N1 vaccination.
- This prompted investigations into the association between the swine flu vaccine and neurological disorders.
Purpose of the Study:
- To review epidemiological studies on narcolepsy following H1N1 vaccination.
- To explore potential neuroimmunological mechanisms underlying this association.
Main Methods:
- Retrospective epidemiological study analysis.
- Review of neuroimmunological hypotheses.
Main Results:
- Studies in multiple countries, including Scandinavia, Canada, and France, reported a 13-fold increased risk of narcolepsy.
- Affected children typically experienced rapid-onset cataplexy and narcolepsy weeks after vaccination.
- No specific antibody or T-cell mediated autoimmunity has been identified yet.
Conclusions:
- A strong association exists between H1N1 vaccination and narcolepsy.
- The underlying pathological mechanism is presumed to be autoimmune, though direct evidence is currently lacking.
- Long-term studies will clarify if vaccination causes new cases or accelerates disease onset.
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