The Swedish Medical Products Agency has received reports from health care professionals regarding narcolepsy as suspected adverse drug reaction following Pandemrix flu vaccination.

The reports concern teenaged children who developed narcolepsy symptoms one to two months after vaccination against the H1N1 pandemic. Finland is also looking into the possible link following an increase in the sleeping disorder among children this spring.

According to The Local:

“In the European Union, around 30 million people were vaccinated using Pandemrix. Sweden bought 18 million doses, which was enough to provide two injections for each person in its 9.3 million population.â€