AS03
AS03 (for "Adjuvant System 03") is the trade name for a squalene-based immunologic adjuvant used in various vaccine products by GlaxoSmithKline (GSK). It is used, for example, in GSK's A/H1N1 pandemic flu vaccine Pandemrix. Also in Arepannix and the new Q-pan for H5Ni influenza.[1]
A dose of AS03 adjuvant contains[2]
- 10.69 mg squalene
- 11.86 mg DL-α-tocopherol
- 4.86 mg polysorbate 80
Concerns/controversy
There was increased risk of anaphylaxis following administration of 2009 AS03-adjuvanted monovalent pandemic A/H1N1 vaccine. Anaphylaxis after trivalent influenza vaccination is typically reported at a rate of <1 per million doses. In Quebec, Canada, anaphylaxis following administration of the monovalent AS03-adjuvanted H1N1pdm09 vaccine was reported through passive surveillance at a rate of 8 per million doses administered. This was 20 times higher than the reporting rate for non-adjuvanted trivalent vaccines administered during the six previous seasons. However, adequate estimation of the incidence of anaphylaxis is hindered by wide variations in definitions and diagnosis. Summary of paper:
- Quebec passive surveillance showed an increase in anaphylaxis after H1N1pdm09 vaccination.
- Many cases which were reported as other AEFI also met the criteria for anaphylaxis.
- Anaphylaxis was likely underrecognized and its incidence higher than passively observed.
- Incidence of anaphylaxis is estimated at 13 per million doses administered.
- Enhanced public awareness is unlikely to be the predominant explanation for this increase. [3]
References
- ↑ "FDA panel endorses H5N1 vaccine with adjuvant". 15 Nov 2012.
- ↑ Pandemrix – Summary of product characteristics Archived October 7, 2009, at the Wayback Machine., European Medicines Agency websiteEuropean Medicines Agency website
- ↑ Increased risk of anaphylaxis following administration of 2009 AS03-adjuvanted monovalent pandemic A/H1N1 (H1N1pdm09) vaccine Vaccine 19 Oct 2013 Online
See also
- 2009 flu pandemic
- MF59 – another squalene-based adjuvant by Novartis
- AS04 – another adjuvant by GSK