New data has added more evidence supporting a link between the 2009 H1N1 influenza vaccine and narcolepsy in children and adolescents. The findings suggest that those who were vaccinated had a close to 660 percent increase in risk for the condition.
The Sweden's Medical Products Agency (MPA) examined cases of narcolepsy with cataplexy reported in young people (19 years and under) in Sweden, and found that out of 81 cases examined, 69 (85 percent) had received the Pandemrix vaccine before illness onset. They also found that the incidence of narcolepsy was substantially higher within 3 months of the vaccination -- 14.1 per 100,000 people during that period, compared to just 1.3 per 100,000 people normally.
According to CIDRAP:
"As noted in the new report, signs of a Pandemrix-narcolepsy link has also been seen in Finland, where a population-based registry study pointed to a ninefold increase in risk for vaccinated children and adolescents."