Lauren Sompayrac, PhD, was a Research Professor in the Department of Molecular, Cellular, and Developmental Biology at the University of Colorado, USA. He is a graduate of the Massachusetts Institute of Technology and was a Postdoctoral Fellow in the Department of Pathology at the Harvard Medical School. Now retired, Dr. Sompayrac is the author of How the Immune System Works, How Pathogenic Viruses Work, How Cancer Works, and How Pathogenic Viruses Think.