Beyond The Count: Why Particle Forensics Matters More Than Ever In Biologics Development

By Marissa Jones, PhD

Particle counts can tell you something is wrong. They don’t tell you why, and in biologics, that distinction can define success or failure. As protein therapies and advanced modalities grow more complex, traditional particle testing methods increasingly miss what matters most: translucent aggregates, formulation‑driven artifacts, and particles that look identical by count but behave very differently in patients. Explore why particle forensics is becoming a critical discipline in modern development, moving beyond pass/fail specifications to particle identification, morphology, and root-cause analysis. Through real-world examples, see how orthogonal techniques and image-based classification change development decisions, shorten investigations, and prevent teams from chasing the wrong problems.

The takeaway is clear: understanding what your particles are—and how they got there—is no longer optional. It’s how risk is managed before it reaches the clinic.