The Human Health Sciences Group conducts basic science and applied research on the mechanisms of action of the effects of chemicals and drugs in humans, how gene expression is regulated, and bone metabolism and fracture repair. We also focus on understanding the damage caused by radiation exposure, developing new technology for biosurveillance of outbreaks of infectious diseases, and accelerating the development of medical countermeasures. Our studies help us to understand how people respond to drugs and chemicals, how they vary in their response, and how to prevent deleterious effects.