125285 -

Most traditional flu vaccines are grown in chicken eggs—a process that has remained largely unchanged for decades. However, the product filed under BLA STN 125285 is different. Manufactured by Protein Sciences Corporation (a Sanofi company), Flublok is a . Here is what that means for you:

: Flublok Quadrivalent contains three times the active ingredient (antigen) of standard-dose flu vaccines, which is designed to provide a stronger immune response. 125285

Next time you see the number on a medical form or a CDC fact sheet , you’ll know it’s not just a filing code. It’s the identifier for a sophisticated, egg-free tool in our public health arsenal that helps millions of people stay healthy every winter. Most traditional flu vaccines are grown in chicken

While "125285" might look like a random string of numbers, it is actually a significant identifier in the world of public health and pharmaceutical regulation. Most notably, is the Biologics License Application (BLA) Submission Tracking Number (STN) assigned by the FDA for Flublok , a unique type of influenza vaccine. Here is what that means for you: :

At first glance, it’s just a number. In reality, it represents the FDA's authorization of Flublok Quadrivalent, a breakthrough in how we manufacture vaccines. What Makes 125285 Special?

: The recombinant process allows for a more precise match to the flu strains predicted for the season, as it avoids "egg-adaptation" mutations that can sometimes make traditional vaccines less effective. Who is it for?

The Science Behind STN 125285: Why Flublok is a Flu Season Game Changer