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
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? Most traditional flu vaccines are grown in chicken