Dr. Ana Maria Rule is an assistant professor at the Johns Hopkins Bloomberg School of Public Health, where she earned her Master's in Occupational Health Sciences in 1996 and her Doctorate in Environmental Health Sciences in 2005. Dr. Rule's experience focuses on assessing exposure to environmental hazards, including aerosols from e-cigarettes, bio-aerosols in nosocomial and agricultural settings, and environmental contamination from metals. She is currently the PI of a project investigating metal exposure from e-cigarettes. Her laboratory developed an innovative method for collecting e-cigarette aerosols that allows chemicals to be measured. Through her experience in aerosol research and exposure assessment, she uses a multitude of analytical and sampling methods, including ICP-MS and GC-MS. She is currently director of the Johns Hopkins University Environmental Exposure Assessment Laboratories, where she develops and applies methods for assessing airborne exposures in adult and pediatric populations. These exposures include organic and inorganic components of e-cigarettes, secondhand smoke, bio-aerosols, and air pollution. She has experience working on multidisciplinary projects that involve collaboration with researchers from other disciplines.