Clare Rock MD MS is an Assistant Professor in the Department of Medicine, Division of Infectious Diseases, Johns Hopkins University School of Medicine, an Associate Hospital Epidemiologist at The Johns Hopkins Hospital and a faculty member of the Armstrong Institute for Patient Safety and Quality. Dr. Rock is PI on a current cluster randomized cross over study looking at the impact of UV-C light disinfection on the transmission of Clostridium difficile and vancomycin resistant enterococci. She has led studies published in peer reviewed journals examining the near patient environment contamination with hospital associated pathogens. This includes a study examining the correlation between contaminations of healthcare worker personal protective equipment on room exit and touching of near patient surfaces during routine patient care and examining air as a potential route of transmission of Acinetobacter baumannii. She has expertise and has published in the transdisciplinary approach of human factors engineering and infection prevention, particularly as it relates to environmental cleaning. She has significant experience with research methodology on the prevention of healthcare-associated infections, including conducting a randomized controlled trial examining the issue of need for hand hygiene prior to non-sterile gloves and multiple quasi-experimental studies. Dr. Rock is the associate director of the Society for Healthcare Epidemiology of America (SHEA) research network and is a member of the SHEA research committee. She is an active researcher including funding from the Agency for Healthcare Research and Quality and the Centers for Disease Control and Prevention. Her main area of interest is the role of the environment in transmission of pathogens in the healthcare setting.