New research shows that children who received a particular swine flu (H1N1) vaccine are at a much higher risk to develop narcolepsy. Narcolepsy is a sleep disorder associated with extreme tiredness during the day, as well as suddenly and unintentionally falling asleep. The study, conducted in Finland, showed that between 2002 and 2009, before the swine flu became a real problem, there were only .31 per 100,000 children under the age of 17 who had narcolepsy. Once the swine flu pandemic struck in 2010, this number jumped to 5.3 per 100,000 children, but the rate of narcolepsy in adults remained unchanged. Researchers believe the increase may be related to the vaccine Pandemrix, which was given to children in the UK, Finland, Sweden and other European countries. The vaccine has no other uses and is no longer in use.