Huw Day and Léo Gorman from the JGI talk to Dr Nina Di Cara about Data Hazards and Digital Phenotyping. Nina has a background in social care and has a PhD in Public Health, where her work focussed on understanding whether digital footprints are an effective way to track mental health. She now works as a postdoctoral researcher in Mental Health Data Science here at the University of Bristol and co-organises the Data Ethics Club and the Data Hazards project.