Sanofi has received approval from the US Food and Drug Administration (FDA) for 0.5ml Fluzone Quadrivalent vaccine to treat influenza in children aged between six and 35 months.

Sanofi Pasteur is set to provide both 0.5ml and 0.25ml dose for the expanded age group.

Discover B2B Marketing That Performs

Combine business intelligence and editorial excellence to reach engaged professionals across 36 leading media platforms.

Find out more

Fluzone Quadrivalent is designed for active immunisation to prevent flu caused by influenza A subtype and type B viruses. The vaccine already holds approval for use beyond this age range.

The latest approval is based on results from a Phase IV clinical trial conducted to assess the safety and immunogenicity of 0.5ml dose in approximately 2,000 children aged 6-35 months.

One or two 0.5ml doses of the vaccine demonstrated a safety profile comparable to one or two doses of 0.25ml. The 0.5ml also did not cause any new safety concerns, and trigged a strong immune response, the company said.

Sanofi Pasteur North America regional medical head David Greenberg said: “Offering paediatricians the convenience of the same 0.5ml dose option for children, may help streamline immunisation efforts.

GlobalData Strategic Intelligence

US Tariffs are shifting - will you react or anticipate?

Don’t let policy changes catch you off guard. Stay proactive with real-time data and expert analysis.

By GlobalData
“Offering paediatricians the convenience of the same 0.5ml dose option for children, may help streamline immunisation efforts.”

“The potentially life-threatening effects of influenza in children reported during the 2017-18 season, especially among those who were not vaccinated, is sobering. We commit ourselves every day to bring solutions to help meet ongoing public health needs related to influenza, especially among vulnerable groups such as young children.”

The company’s flu vaccine portfolio also includes Flublok Quadrivalent and Fluzone High-Dose.

Flublok Quadrivalent is indicated for people aged 18 years and older while Fluzone High-Dose vaccine holds approval for use in individuals aged 65 years and above.

The most common adverse reactions to Flublok Quadrivalent and Fluzone High-Dose vaccines were observed to be pain at the injection site, headache and myalgia.

Pharmaceutical Technology Excellence Awards - Nominations Closed

Nominations are now closed for the Pharmaceutical Technology Excellence Awards. A big thanks to all the organisations that entered – your response has been outstanding, showcasing exceptional innovation, leadership, and impact.

Excellence in Action
NorthWest EHealth has won three 2025 Pharmaceutical Technology Excellence Awards for Innovation, Safety and Diversity. Explore how its ConneXon platform is transforming SAE reporting and real-time safety oversight, while FARSITE delivers socio-economically inclusive recruitment to boost trial efficiency, data integrity and regulatory-grade representativeness.

Discover the Impact