Indresh K. Srivastava, PhD, is recognized as an expert in the field of vaccine research, particularly immunogen design, purification, and characterization of vaccines. He has been working in the field for more than twenty-five years; has published more than seventy-five scientific papers in peer-reviewed journals; and authored several reviews and book chapters. In addition, he has served on NIH special emphasis study sections focused on HIV Vaccines. He is on the editorial board of Current HIV Research, and is reviewer for ten international journals. After spending more than twelve years at Chiron/Novartis, Dr. Srivastava has joined the Vaccine Research Institute, NIAID/NIH, to lead the purification and analytical development of vaccine candidates. Prior to joining Chiron, he was an assistant professor (research) in microbiology and immunology, Medical College of Pennsylvania, Philadelphia.