Dr. Melissa Haskell is the Head of Non-Clinical Toxicology and Attending Veterinarian at Alexion Pharmaceuticals in Boston, MA. She has been at Alexion since 2012, where she leads a team working to develop both large and small molecules. She has extensive experience in animal model development and characterization, and works with a team of toxicologists and pathologists to understand the advantages and limitations of these models in drug development.