Chuck Gerba is a professor in the Departments of Soil, Water and Environmental Science (College of Agriculture), and Epidemiology and Biostatistics (College of Public Health) at the University of Arizona. He obtained his Ph.D. in Microbiology from the University of Miami, Florida and was a faculty member in the Department of Virology and Epidemiology at Baylor College of Medicine from 1974 to 1981. He conducts research on the transmission of pathogens through the environment. His recent research encompasses the transmission of pathogens by water, food and domestic environments; development of new disinfectants; domestic microbiology and quantitative microbial risk assessment. He has been an author on more than 500 articles including several books in environmental microbiology. He is an elected member of the American Academy of Microbiology and an elected fellow of the American Association for the Advancement of Science. He was a member of the U. S. Environmental Protection Agency Science Advisory Board for nine years. He received the 1999 Award of Excellence in Environmental Health from the National Association of County and City Health Officials for his work on norovirus outbreaks on the Colorado River. He has been a consultant to the World Health Organization, Centers for Disease Control, Department of Homeland Security, Department of Defense, U.S. Environmental Protection Agency and numerous state and local agencies. He has appeared on numerous TV shows including Good Morning America, Today Show, 20/20, CNN News, 48 Hours, etc. His work has been quoted in Readers Digest, Prevention Magazine, Good Housekeeping, Women’s Health, etc.