Louis is a true believer in the need for robust, animal-free, and human-relevant models in toxicity testing and is an immunologist by trade. Louis believes exploring the modulation of macrophage biology in commercial testing is pivotal for understanding important aspects of how our lungs and bodies are affected by inhaled compounds. Immune cells are our “knights in shining armour” when it comes to protecting our body, and by that logic, ensuring their health is incredibly important.