Megan M. Reynolds, BSChE, MS, MBA, is a freelance medical writer and editor with a focus on infectious diseases. She holds degrees in chemical engineering, international business, and medicine, and has more than 12 years’ experience in the pharmaceutical industry in a variety of capacities. Louis Theodore, MChE, EngScD, is a retired professor of chemical engineering with over 50 years’ education experience. He has authored numerous publications and has served as section editor to the last four editions of Perry’s Chemical Engineer’s Handbook. Dr. Theodore currently works as an environmental engineering consultant.