GSK Issues Hold for One Lot of H1N1 Vaccine Following Adverse Events

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GlaxoSmithKline (London, UK) has put on hold one lot of its Arepanrix adjuvanted H1N1 flu vaccine in Canada, following reports of a higher than usual number of adverse events.

Yesterday, GlaxoSmithKline (London, UK) put on hold one lot of its Arepanrix adjuvanted H1N1 flu vaccine in Canada, following reports of a higher than usual number of adverse events.

The company took this action as a higher than expected rate of serious allergic reactions (anaphylaxis) related to lot number A80CA007A. These observations have not been reported with vaccines from any other lots.

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To date, approximately 15 million doses of Arepanrix have been distributed in Canada, and overall, the frequency of severe allergic reactions following immunization is less than 1 event per 100,000 doses, which is similar to the rate typically reported for vaccines.