Risk of narcolepsy in vaccinated against swine flu in 2009 was increased by 17 times. In another study the risk was increased 4-9 times. Third study showed 14-16 times narcolepsy risk increase.
A similar Swedish study found increased psychiatric comorbidity in children and adolescents with narcolepsy.
A possible explanation of this phenomenon may be that the human antibodies to nucleoprotein cross-react with human hypocretin receptor. [1]
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