The Team

Dionne Gesink (She/Her)

Dr. Dionne Gesink is a Professor of Epidemiology with the Dalla Lana School of Public Health at the University of Toronto. Gesink’s research focuses on the social epidemiology of sexual and mental health. She has studied the role of both natural and built environment on the social geography of sex and sexual partner selection, as well as the spatial and spatiotemporal distribution of sexually transmitted infections. Gesink seeks to empower individuals and communities as they work together to better understand the many ways culture and environment shape the patterns of sexual behaviours, sexual health, relationships, mental health and wellness. Gesink has worked with Indigenous, marginalized, and hard-to-reach communities, as well as the general population, to develop effective interventions to transform sexual health and relationships at individual, community, and provincial levels. 

Henry Yang (He/Him/They/Them)

Henry is a Master’s of Public Health student at the Dalla Lana School of Public Health. He previously worked with the Mark S. Bonham Centre’s Queer and Trans Research Lab’s undergraduate cohort. He later joined the Dalla Lana School of Public Health’s Centre for Sexual and Gender Minority Health Research and investigated the efficacy of the Stepped Care 2.0 model of mental health care delivery in post-secondary settings.

Sean Zinner (He/Him)

Sean is a Master’s of Public Health student at the Dalla Lana School of Public Health. His research interests include the social epidemiology of sexual and mental health, as well as the integration of mixed-methods approaches in public health research. He has conducted prior research in areas such as adolescent mental health, patient safety in ambulatory care, and accessibility for people with physical and developmental disabilities. Outside of school, Sean enjoys playing video games and staying active, whether at the gym, exploring the city, or spending time with friends and family.

Delenn (Len) Hills (She/Her/They/Them)

Len is completing her Master of Public Health in Health Promotion at the Dalla Lana School of Public Health. She holds a bachelor’s degree in Neuroscience and Mental Health from Carleton University, where her interest in queer health research was sparked while volunteering on a project investigating the experiences of 2SLGBTQIA+ students with campus health, academic and social services. Len is interested in research concerning the nexus of gender, sexuality, sexual health and mental wellbeing, as well as how environmental change influences mental health. In her free time, she enjoys hiking, photographing the outdoors, drawing and crafting!

Geography of Sex



155 College Street
Toronto, ON M5T 1P8