TB Modeling and Translational Epi Group

Group Members

David Dowdy

Johns Hopkins School of Public Health

David Dowdy is an Associate Professor of Epidemiology, International Health, and General Internal Medicine at Johns Hopkins. His research interests include epidemiological study of TB and TB/HIV, mechanistic modeling of TB epidemics, economic evaluation of TB interventions (especially for diagnosis and case finding), and translation of TB data into appropriate frameworks for decision-making. He joined the faculty at Hopkins in 2011 and also practices general internal medicine in urban East Baltimore. He sits on the Steering Committee of the TB Modeling and Analysis Consortium, serves as Associate Editor of the International Journal of Tuberculosis and Lung Disease, and is the Principal Investigator of multiple research grants from the National Institutes of Health and other funding agencies to evaluate TB transmission and interventions in the United States, South Africa, Uganda, and Southeast Asia. When not at work, you can often find him baking cookies, playing tennis, or climbing with his teenage daughter.

Jonathan Golub

Johns Hopkins School of Public Health

My research focuses on the epidemiology of tuberculosis in South Africa, Brazil, India and the US, with specific focus on the drivers of TB in these settings. I am currently leading a cluster randomized trial in South Africa observing diagnostic and treatment practices for latent TB infection among HIV-infected patients at 14 HIV clinics. Also, in South Africa, I lead a smoking cessation clinical trial among HIV-infected patients and projects investigating indoor air pollution, smoking, and potential mHealth solutions for many patient populations. I also lead a study investigating TB treatment outcomes among TB patients with diabetes in India, and other studies in India looking at impact of indoor air pollution and smoking on TB in this setting.

Emily Kendall

Johns Hopkins School of Public Health

Emily Kendall, MD, is an Assistant Professor in the Division of Infectious Diseases in the JHU School of Medicine. As an infectious diseases clinician as well as a mathematical modeler, she seeks to improve the treatment of tuberculosis using computational frameworks combined with preclinical, clinical, and epidemiologic data. She is interested in individualizing therapy based on patient and TB strain characteristics, optimizing the use of novel drugs and regimens for TB treatment, preventing emergence of new drug resistance, and anticipating the impact of treatment guidelines and policies on TB epidemics.

Todd Fojo

Johns Hopkins School of Public Health

I am an Assistant Professor in the Division of General Internal. In addition to my medical degree, I have a background in computer science and statistics. My research centers on improving the individual- and population-level health of persons with TB or HIV and mental health comorbidities using innovative statistical and machine learning algorithms. Specific projects include making personalized predictions about psychiatric disease and HIV control, as well as population-level models to forecast TB and HIV epidemics under a range of potential interventions.

Xiangrong Kong

Johns Hopkins School of Public Health

I received my training in applied mathematics and biostatistics, and have been working as a biostatistician and epidemiologist in the field of HIV/AIDS and common STDs. In the recent a few years, I also worked extensively in the field of ophthalmology. Motivated by research data from these areas, my statistical methodology work has focused on longitudinal data with complicated correlation structures. I also received training through a career award in social and behavioral sciences in the context of promoting health seeking behaviors for HIV prevention. My current research interests include: translational epidemiology research to evaluate the population impact of scale-up of HIV prevention interventions using empirical data and methodology development for using structural parameters in vision research.

Colleen Hanrahan

Johns Hopkins School of Public Health

Colleen Hanrahan is an Assistant Scientist in the Epidemiology Department at Johns Hopkins School of Public Health. Her primary interest area is the intersection of the global HIV and TB pandemics. Her current work focuses on operational research on the implementation and patient impact of new and existing TB diagnostics, isoniazid preventive therapy, and active case finding approaches for TB. She is also interested in evaluating approaches to initiate and retain HIV positive individuals in care. Colleen has spent 3 years living in South Africa, and brings a wealth of “on the ground” research experience as well as a deep love for the African continent.

Sourya Shrestha

Johns Hopkins School of Public Health

Sourya Shrestha is a Research Associate in the department of Epidemiology at the Johns Hopkins Bloomberg School of Health. He received his doctoral training in applied mathematics from the University of Michigan, and postdoctoral training in ecology and epidemiology of infectious diseases at Michigan and Hopkins, respectively. He is interested in developing mathematical and computational models of epidemiology of infectious diseases, and to ultimately use them to design and inform effective public health interventions. Although he maintains interest in the epidemiology of pneumococcus and dengue virus, tuberculosis (TB) is the primary focus of his current research. Some of his recent and ongoing work includes (i) understanding the heterogeneity of TB in the context of targeted interventions; (ii) modeling dynamics and control of domestic TB in the US (in collaboration with the CDC); and (iii) developing models to inform active case finding efforts in Pakistan and Bangladesh (in collaboration with IRD), and in Nepal (in collaboration with IMPACT TB team).

Hojoon Sohn

Johns Hopkins School of Public Health

Hojoon (BA, Bowdoin College; MPH, University of Michigan; PhD, McGill University), is an Assistant Scientist in the Department of Epidemiology (June 1st, 2019) at Johns Hopkins Bloomberg School of Public Health. My research focuses on an inter-disciplinary agenda that aims combine methodologies and topics across disease disciplines, including translational epidemiology, operations research, health economics, health systems and technology assessment. Through my research, I seeks to streamline health economic and epidemiology methods in both mode-based and field-based studies that can supplement evidence-based deisions in global and national-level policies and to innovate new data-gathering moethods/studies. I have more than 10 years of experience conducting tuberuclosis and HIV/AIDS studies in various low and middle-income countries (India, Lesotho, Malawi, Nepal, Peru, Philippines, South Africa, Thailand, Zambia, Uganda, Morocco, Timor Leste) as well as in high income countries (Canda, South Korea, United States). During my off-time, I enjoy spending my time with my son, Haewon, and playing the clarinet.

Youngji Jo

Johns Hopkins School of Public Health

Youngji Jo is a post-doctoral fellow at the Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health (JHBSPH). She analyzes cost-effectiveness models of tuberculosis, and preventive therapy in the United States as well as costing and performance data for TB REACH program in Zambia. She earned her Ph.D. in Health Systems Program in the Department of International Health at JHBSPH. Her thesis research was about cost-effectiveness and scalability of an mHealth program, which uses mobile phones to improve pregnancy surveillance and care seeking of essential maternal and newborn health service in rural Bangladesh. She holds M.A. in International Relations/Economics at Johns Hopkins School of Advanced International Studies (SAIS) and a B.E. in Electrical Engineering at Seoul National University in South Korea.

Phillip Salvatore

Johns Hopkins School of Public Health

Phillip Salvatore is a PhD Candidate in the Department of Molecular Microbiology and Immunology at the Johns Hopkins Bloomberg School of Public Health. His research focuses on the interface between pathogen biology and infectious disease epidemiology as it pertains to public health. By understanding the pathological dynamics of Mycobacterium tuberculosis through mathematical models, he aims to translate molecular studies into a clinical and population context. Each spring, he joins Professor Bill Moss in teaching Practical Epidemiology for Basic Scientists to a wide audience of laboratorians and graduate students. Before arriving at Johns Hopkins, he worked in Niger, Senegal, and Chad for multiple international organizations and received his Master of Science in Epidemiology from the Harvard School of Public Health.

Kate Shearer

Johns Hopkins School of Public Health

Kate Shearer is a PhD Candidate in the Department of Epidemiology at the Johns Hopkins Bloomberg School of Public Health and a Fogarty Global Health Scholar at the Health Economics and Epidemiology Research Office in Johannesburg, South Africa. Her current research is primarily focused on novel analyses of laboratory data to characterize the TB epidemic in South Africa and her other research interests include programmatic (mortality and loss to follow-up), treatment (virologic suppression and failure) and clinical (opportunistic infections) outcomes of people living with HIV.

Katherine Robsky

Johns Hopkins School of Public Health

Katherine is a PhD candidate in the Department of Epidemiology at the Johns Hopkins Bloomberg School of Public Health. Her dissertation research uses spatiotemporal patterns to identify populations at risk for TB that could be prioritized for preventive and case finding interventions in urban Kampala. She previously completed her MPH in Infectious Diseases at University of California, Berkeley and has worked in TB control and research in Thailand, California, and Namibia.

Alexandra Zimmer

Johns Hopkins School of Public Health

Alexandra Zimmer holds a BSc in Molecular Biology from the University of Toronto and is currently pursuing a Masters of Science in Public Health at the Johns Hopkins Bloomberg School of Public Health, specializing Global Disease Epidemiology and Control. She is interested in improving the quality and accessibility of point-of-care TB diagnostics in low-resource settings by engaging in diagnostic impact evaluations. Over the summer, she will be participating in the XPEL TB trial in Kampala to assess the decentralization of a molecular TB testing platform.

Austin Tucker

Johns Hopkins School of Public Health

Austin Tucker is a Senior Research Program Coordinator in the Department of Epidemiology at Johns Hopkins School of Public Health. His research primarily focuses on costing and economic evaluation methods for HIV and TB program interventions in resource-limited settings. Austin has experience organizing and developing tools for primary data collection efforts for costs as well as producing cost-effectiveness and econometric models to understand the value of health system interventions. His interests include international economic development, the effects health system constraints have on scale-up and cost-effectiveness, and the role of health economics in international policy agenda setting. In his free time Austin enjoy cycling, rock climbing with his girlfriend and playing basketball.

Olivia Ferguson

Johns Hopkins School of Public Health

Olivia is a research assistant in the Department of Epidemiology. Her work primarily involves cost data collection and performing economic evaluation and cost effectiveness research on TB & HIV interventions. She received an Master of Science in Public Health, Health Economics, from The London School of Hygiene and Tropical Medicine in 2018, and has a BA in Economics & History from Villanova University. Her previous work looked at the cost effectiveness of the use of microloan programs to reduce intimate partner violence in Tanzania.

Isabella Gomes

Johns Hopkins School of Public Health

Isabella Gomes is a graduate student at Johns Hopkins Bloomberg School of Public Health. She is currently pursuing a Master in Public Health degree in Epidemiology and Biostatistics and is interested in the modeling and analysis of infectious disease dynamics and the epidemiology of tuberculosis in Bangladesh and South Africa. She previously earned a Bachelor of Arts in Ecology and Evolutionary Biology at Princeton University in 2016 and a Master of Arts in Investigative Journalism at Columbia University in 2017.