She is an environmental and molecular epidemiologist whose research focuses on the association between arsenic and adult chronic diseases. Her work has also focused on the molecular impacts of arsenic on the transcriptome and epigenome as well as interplay with the genome, and how this leads to disease development. Dr. Argos has spent several years investigating the cancer prevention effects of selenium and vitamin E in a chronically arsenic exposed population. She is an investigator on the Columbia University Superfund Research Program's Health Effects of Arsenic Longitudinal Study (HEALS), a longitudinal cohort study of arsenic-exposed adults living in Araihazar, Bangladesh. Adults in the HEALS study have been followed since 2000 to determine the impact of arsenic exposure on chronic diseases and the underlying mechanisms of toxicity.