Dr. Honglei Chen is a professor in the Department of Epidemiology and Biostatistics whose research focuses on studying environmental causes of neurodegenerative diseases, with the ultimate goal of disease prevention and healthy aging. To achieve this, he is focused on three primary areas: searching for environmental causes of Parkinson’s disease and neurodegeneration; understanding the complexity of prodromal neurodegeneration and the roles of the environment; and studying poor olfaction as a “miner’s canary” foretelling deteriorating health in older adults.