Trivalent and Quadrivalent Seasonal Influenza Vaccines
This information is being disseminated to assist immunisation providers to address a reported misperception in the community that the funded Trivalent influenza vaccine is inferior to the Quadrivalent for use in the approaching influenza season.
Two types of inactivated influenza vaccines are available in Australia this year - Trivalent Influenza Vaccine (TIV) and Quadrivalent Influenza Vaccine (QIV). In 2015 the National Immunisation Program is distributing government-purchased TIV. QIV is available for purchase in the private market.
The influenza vaccine is updated each year to reflect virus strains circulating around the world in the last 12 months. Production of both types of vaccine was delayed this year due to the need for two strain changes; usually only one new antigen needs to be produced.
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