European Commission approves Fluenz Tetra for the prevention of seasonal influenza in children

Friday, 6 December 2013

AstraZeneca today announced that the European Commission (EC) has granted Marketing Authorisation to FluenzTM Tetra. Fluenz Tetra is a nasally administered four-strain live attenuated influenza vaccine for the prevention of influenza in children and adolescents from 24 months up to 18 years of age. The EC approval makes Fluenz Tetra the first and only intra-nasal four-strain influenza vaccine available in Europe.

Historically, seasonal flu vaccines have contained three strains of influenza: two influenza A viruses (H1N1 and H3N2) and one influenza B virus. Fluenz Tetra contains an additional influenza B strain. Over the past decade, influenza B strains accounted for approximately 25 percent of the influenza strains circulating in Europe.

“Fluenz Tetra represents the next generation of influenza vaccine and we are pleased that it is now approved in Europe,” said Filip Dubovsky, Vice President of Clinical Biologics Infectious Disease and Vaccines at MedImmune, AstraZeneca’s global biologics research and development arm. “The inclusion of a second influenza B strain will broaden the coverage of Fluenz Tetra and should have a valuable public health impact.”

The Marketing Authorisation of Fluenz Tetra is based on data from a pivotal paediatric study. Findings showed that Fluenz Tetra demonstrated a safety and immunogenicity profile that was comparable to Fluenz™, a three-strain (trivalent) live attenuated influenza vaccine already approved in Europe.

The EC decision follows a positive opinion from the Committee for Medicinal Products for Human Use on 19 September 2013, and is applicable to all 28 member states and the three European Economic Area countries of the European Union.


About Influenza

Influenza is the most common vaccine-preventable disease in the developed world. In Europe and throughout the world, influenza creates a significant medical and economic burden. According to World Health Organization (WHO) estimates, seasonal influenza results in three to five million cases of severe illness and up to half a million deaths globally each year. Rates of infection are highest among children, and school-aged children are recognised as the main transmitters of the flu virus. Vaccinating children can lower the overall burden of influenza. This is achieved through direct protection of the child and through indirect effects that are a result of decreased transmission of the virus from children to others in the community, often referred to as herd immunity.

About Fluenz Tetra

Fluenz Tetra is formulated to contain four live attenuated influenza virus strains that are weakened so as to not cause illness.The vaccine is administered by spraying into each nostril where it induces protective immunity. The most common adverse reactions for Fluenz Tetra include runny nose or nasal congestion.

Fluenz Tetra will replace the Fluenz™ three-strain (trivalent) live attenuated influenza vaccine from the 2014-2015 flu season onwards.

In the US, Fluenz Tetra is marketed by MedImmune Specialty Care Division of AstraZeneca, under the trade name FluMist® Quadrivalent (Influenza Vaccine Live, Intranasal). FluMist Quadrivalent was approved by the US Food and Drug Administration (FDA) on 29 February 2012.

About Tetravalent Influenza Vaccines

Vaccine strains are recommended annually by the World Health Organization (WHO) based on anticipated circulating influenza strains for the upcoming season. Historically, seasonal flu vaccines have been trivalent formulations, meaning they contain three strains of influenza: one influenza A (H1N1) virus, one influenza A (H3N2) virus, and one influenza B virus. However, new tetravalent (also referred to as quadrivalent) flu vaccines contain two strains of influenza A and two strains of influenza B to provide broad protection against influenza B.

Since 2001, influenza B strains from two different lineages (B/Yamagata and B/Victoria) have co-circulated each influenza season in Europe. Trivalent vaccine formulations rely on predictions of which influenza B strains will be dominant in the upcoming season. However, B strain circulation has been difficult to predict correctly, and in the last decade, the vaccine B strain only matched the dominant circulating B strain about every other year.

About MedImmune

MedImmune is the worldwide biologics research and development arm of AstraZeneca. MedImmune is pioneering innovative research and exploring novel pathways across key therapeutic areas, including respiratory, inflammation and autoimmunity; cardiovascular and metabolic disease; oncology; neuroscience; and infection and vaccines. The MedImmune headquarters is located in Gaithersburg, Md., one of AstraZeneca’s three global R&D centers. For more information please visit

About AstraZeneca

AstraZeneca is a global, innovation-driven biopharmaceutical business that focuses on the discovery, development and commercialisation of prescription medicines, primarily for the treatment of cardiovascular, metabolic, respiratory, inflammation, autoimmune, oncology, infection and neuroscience diseases. AstraZeneca operates in over 100 countries and its innovative medicines are used by millions of patients worldwide. For more information please visit



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