Influenza — Worldwide/Unknown
Influenza has been linked with other sleeping disorders, too. For example, after the epidemic of Spanish flu in 1918, there was an increase in people suffering a “sleeping sickness” known as encephalitis lethargica.
An unusual increase in narcolepsy cases in Europe was linked to a new flu vaccine used there, and now researchers may have figured out why: A protein in the vaccine appears to mimic one in the brain that plays a role in the sleep disorder.
People with narcolepsy experience
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