Peter H.M. Hoet is a member of the Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium, the Head of the Centre of Environment & Health, and the director of the research unit BREATHE. He graduated with a PhD in Medical Sciences, in 1995, at KU Leuven, Belgium, and with a Master of Science in Applied Toxicology, in 2011, at the University of Surrey, U.K. His research focuses include a) in vitro toxicology and primary cell cultures to study the mechanisms of toxicity; b) fine particles and nanomaterial toxicology (sarcoidosis, fibrosis, and effects of inhaled particles); c) environmental exposure-related (low-molecular-weight chemicals) immune effects; d) genetic and epi-genetic effects; e) the identification of biomarkers of exposure/disease; f) epidemiological research in environmentally induced disorders; and g) risk evaluation/assessment. He is involved in courses on toxicology and the effects on health and environment in the Master classes of Medical Sciences, Biology and Bioengineering, KU Leuven, and for the interuniversity Master after master Global Health, and is a Board member of BelTox, a member of EuroTox, SOT, and ERS.