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Name Supervisor Research Interests

Ohanna Cavalcanti Bezerra

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France Gagnon

Celia Greenwood (McGill University)

PhD in Molecular Biology/Genetics, Oswaldo Cruz Foundation
MSc PhD in Molecular Biology/Genetics, Oswaldo Cruz Foundation
BSc Biomedicine, Federal University of Rio de Janeiro State

Dr. Ohanna Bezerra is a currently postdoctoral research fellow at the Dalla Lana School of Public Health, University of Toronto. Having expertise in genetic epidemiology and genetics of infectious diseases, she is involved in projects on the evaluation of genetic variants and methylation patterns in the human genome related with disease prediction. Her work includes the investigation of sex-specific epigenetic signatures of venous thromboembolism recurrence. She is also leading a project granted by the CANSSI Ontario STAGE program to evaluate association of thrombosis-related variants with COVID-19 severity using next-generation sequencing data of COVID-19 patients (Hostseq). Her research interests include genetic epidemiology, (epi)genomics, evolutionary genetics, population genetics and infectious diseases. Ohanna loves sports and travelling.

Emerich Daroya

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Daniel Grace


Ph.D., Sociology, Carleton University
M.A., Sociology, Carleton University
B.A., Political Science, York UniversityDr. Emerich Daroya is a postdoctoral researcher in the Division of Social and Behavioural Health Sciences at the Dalla Lana School of Public Health. A sociologist by training, he draws on queer-feminist science and technology studies to study gay, bisexual, and queer men’s sexual health using qualitative methods. His research interests include queer theory, HIV/AIDS, new materialisms, sexuality studies, and race/racism. His research at DLSPH focuses on the impacts of COVID-19 on gay, bisexual, and queer men’s sexual and mental health; and the effects of pre-exposure prophylaxis (PrEP) on gay, bisexual, and queer men’s sexual lives.

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Katie MacEntee

Paula Braitstein Dr. MacEntee’s research focuses on the use of participatory visual methodologies to address HIV and AIDS, gender-based violence, LGBTQ2S youth homeless and for the study of sexual and reproductive health. She is the postdoctoral fellow on the CIHR funded project “Adapting and Scaling-up “Peer Navigators” to Targeted Populations of Street-Involved Youth in Canada and Kenya to Increase Linkage to HIV Prevention, Testing and Treatment”, which is studying the adaptation and scale up of peer outreach workers to support youth who are experiencing housing insecurity in Canada and Kenya to access HIV testing, prevention, and treatment. Katie is also working with Dr. Sarah Flicker, at York University, on the the Canadian Foundation for AIDS Research and SSHRC funded study, Celling Sex, which is using cellphilms (participatory video made using a cellphone) to investigate young women experiences of transactional sex in Toronto, Canada.

Tammy MacLean

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Angela Mashford-Pringle Dr. Tammy MacLean (RN, BA, MA, PhD) is a settler with mixed Western European ancestry and a CIHR Health System Impact Post Doctoral Fellow at the Centre for WISE Practices in Indigenous Health, Women’s College Hospital (WCH), and the Dalla Lana School of Public Health (DLSPH). As a non-Indigenous ally, Tammy is working with Dr. Lisa Richardson (WCH and Temerty Faculty of Medicine) to lead several studies that apply collaborative, anti-colonial approaches to address anti-Indigenous racism and identify opportunities to promote Indigenous health and advance cultural safety in healthcare organizations across Canada. At DLSPH, Tammy worked with Dr. Angela Mashford-Pringle to co-developOshki M’naadendimowin New Respect Cultural Safety, a 36-hour course for Faculty, staff, and students of professional health programs at the University of Toronto, which aims to facilitate Reconciliation with Indigenous peoples. Tammy is a Feminist and an interdisciplinary scientist with graduate degrees in Global Public Health (PhD) and International Affairs (MA) and a Liberal Arts Degree in International Studies (BA). She is also a Registered Nurse (RN) with over a decade of clinical experience with made vulnerable groups and communities in Canada, the United States and Australia.

Muriel Mac-Seing

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Erica Di Ruggiero PhD Public Health (Global Health), School of Public Health, Université de Montréal
MSc (Applied), Ingram School of Nursing, McGill University
BSc Nursing, Ingram School of Nursing, McGill University
Dr. Muriel Mac-Seing is a CIHR Postdoctoral Research Fellow at the Centre for Global Health of the Dalla Lana School of Public Health. Her doctoral research project examined the relationships among legislation, health policy, and the utilisation of sexual and reproductive health services by people with disabilities in post-conflict Northern Uganda. Her postdoctoral research work investigates COVID-19- related global health governance and how it is redefining population health research priorities in Canada. Her areas of interest broadly include global public health, global health governance, equity and social justice, intersectionality-based policy analysis, disability rights and inclusion, sexual and reproductive health rights including HIV and AIDS, structural and social determinants of health, integrated knowledge mobilisation and exchange, qualitative research, and mixed methods. She was named among the Canadian Women Leaders in Global Health by the Canadian Association for Global Health.

Sabina Mirza

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Suzanne Stewart Ph.D. Faculty of Education, York University
M.Ed Faculty of Education, York University
B.Ed Faculty of Education, York University
BA Liberal Arts and Professional Studies, York University
Dr. Sabina Mirza holds a PhD in Education from York University, with her research interests focusing on youth homelessness, education, mental health, and community-based research. Sabina has taught courses with an interdisciplinary lens on topics related to ethics, education, youth, families, mental health, social advocacy, and community engagement. She is currently a postdoctoral fellow at the Waakebiness Institute for Indigenous Health at the Dalla Lana School of Public Health. Through her postdoctoral fellowship, Dr. Mirza will use an anti-racist lens to focus on research that aims to Decolonize Indigenous homelessness and mental health. Sabina loves to read, write and laugh – she practices daily mindfulness meditation and is passionate about using mindfulness as a way of helping others improve their health.

Sharifa Nasreen

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Jeff Kwong


PhD (Epidemiology and Biostatistics)
MPH (Master of Public Health)
MBBS (Bachelor of Medicine and Bachelor of Surgery)
Dr. Sharifa Nasreen is a medical epidemiologist with more than 10 years of public health research experience in low- and high-income countries. Her research interests include epidemiology of infectious diseases, including vaccine preventable diseases and vaccine epidemiology. She is a Postdoctoral Fellow at the Dalla Lana School of Public Health, University of Toronto. In her current postdoctoral work, she is involved in COVID-19 vaccine safety and effectiveness studies.

Michelle Olding

Carol Strike Ph.D. in Interdisciplinary Studies, University of British Columbia
MPH, Social and Behavioural Health Sciences, Dalla Lana School of Public Health, University of Toronto
BA, Anthropology and Gender Studies, McGill University
Dr. Michelle Olding (MPH, PhD) is a postdoctoral researcher in the division of social and behavioral sciences at the Dalla Lana School of Public Health. Drawing on qualitative, ethnographic and participatory methods, Dr. Olding studies community-based and structural interventions to advance health equity for people who use illicit drugs. She collaborates with drug user-led groups and allied organizations to conduct research that responds to community needs and priorities related to health care, harm reduction, housing, and drug policy. Her current research focuses on harm reduction approaches to preventing overdose deaths and drug-related harms, including low-barrier supervised consumption sites, safer supply, and housing-based overdose response programs.

Melodie (YunJun) Song

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Erica Di Ruggiero

Shaza Fadel

Sara Allin

PhD Health Policy – McMaster University
GradCert in Global Health and HIV & STI Prevention – University of Washington
MSc Public Health Policy & Management – National Taiwan University
BSc Nursing– National Taiwan University
Dr. Melodie (YunJu) Song is a mixed methods researcher who spends her time contemplating about health misinformation on social media and its effects on health equity. As a CIHR Health Systems Impact Fellow in Equitable Artificial Intelligence (AI) at Public Health Ontario (PHO), she conducted deliberative dialogues with interdisciplinary experts in AI, data science, bioethics, and immunization to identify stakeholder perceptions on AI-assisted immunization program delivery in Ontario. She led the development of an NLP-assisted real-time vaccine sentiment detection dashboard using longitudinal Twitter metadata, and published a review on AI-assisted technologies to support immunization delivery. A current postdoctoral research fellow at the Centre for Vaccine Preventable Diseases, she is supported by two CIHR grants to develop implementation best practices to engagement community and faith-based partners to improve vaccine confidence for ethno-racial and cultural minorities in Canada and select countries. She has conducted rapid reviews for the North American Observatory on Health Systems and Policies (NOA), IHPME (contracted by the Public Health Physicians of Canada), and lends her expertise in network analysis to the Population Health Research Institute (PHRI) at McMaster University (pro bono). She has been a research collaborator of the Social Media Lab at the Toronto Metropolitan University since 2019.

Chenglong Wang

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Xiaolin Wei
Erjia Ge

PhD in Population Geography, The Chinese University of Hong Kong

Dr. Chenglong Wang is a health geographer at the Dalla Lana school of Public Health, University of Toronto. His interest includes spatial and environmental health with focus on health inequities associated with environmental exposures, particularly in migrants. Dr. Wang’s postdoctoral research investigates impacts of air pollution, climate change, greenness, and build environment on various childhood’s respiratory conditions using observational designs and health administrative data, including ICES/UK BioBank under the supervision of Dr. Erjia Ge (in Epidemiology). He also works with Dr. Xiaolin Wei at the Institute of Health Policy, Management, and Evaluation (IHPME) to extend his area to interventional studies using various longitudinal survey data to promote Implementation Sciences in Environmental Health, aiming for a healthy city.

Shishi Wu

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Xiaolin Wei PhD, National University of Singapore
MPH, Columbia University
BSc, Tulane University
Dr. Shishi Wu is currently a postdoctoral fellow in implementation science at the Dalla Lana School of Public Health, University of Toronto. Having expertise in both qualitative and quantitative methods, she is specialized in infectious disease epidemiology and implementation science to improve infectious disease control. Shishi has worked closely with international donors, frontline healthcare providers and national disease control officials in China, Singapore and United States, providing evidence from research and program evaluation to inform clinical and policy decisions on COVID-19, tuberculosis, and antimicrobial resistance (AMR). Her current projects include examining the effectiveness of infection-acquired immunity and COVID-19 vaccines and developing an educational intervention to improve COVID-19 vaccine confidence in the Philippines.

See past DLSPH postdoctoral fellows