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

According to FDA-approved labeling , Flublok is indicated for active immunization against influenza A and B in adults . It is often recommended for older adults who may need that extra "boost" in protection, though it is widely available for the general adult population. Safety and Efficacy Most traditional flu vaccines are grown in chicken

Here is a blog post exploring why this specific number matters in the fight against the flu. Here is what that means for you: :

Every year, as the leaves turn and the air gets crisp, the conversation inevitably turns to "the flu shot." But not all vaccines are created equal. If you’ve ever looked into the technical filings behind your medical options, you might have stumbled upon a specific code: .

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.