Patrick Sullivan, DVM PhD





Dr. Sullivan has 22 years of experience in HIV epidemiology and prevention in men who have sex with men, in the United States and in international settings. He worked in the Centers for Disease Control and Prevention (CDC) for 12 years, including service as an Epidemic Intelligence Service Officer, a Branch Chief, and Acting Deputy Division Director in the Division of HIV AIDS Prevention. He also has experience in design and oversight of biomedical prevention trials, having served as the Associate Director of Scientific Support for the NIH-funded HIV Vaccine Trials Network. He is currently the PI of several NIH-supported research grants to develop improved methods for online HIV prevention studies. Dr. Sullivan holds a PhD in Comparative and Experimental Medicine and a Doctor of Veterinary Medicine (DVM) from the University of Tennessee.




 Travis Sanchez, DVM MPH



Research Associate Professor


Dr. Sanchez received a Doctorate of Veterinary Medicine from the University of Georgia in 1994. After a veterinary internship at North Carolina State University, Dr. Sanchez practiced as an emergency veterinarian in the Metro Atlanta area until he returned to the Rollins School of Public Health at Emory University and received his Master of Public Health degree in International Health and Epidemiology in 2000. Dr. Sanchez began his public health career working for the Georgia Division of Public Health in the notifiable diseases epidemiology section and coordinated the state’s district epidemiologist program. He then went to the Centre for Disease Prevention and Control (CDC) in 2001 and worked for the Surveillance Branch in the Division of HIV/AIDS Prevention and later for the newly created Behavioral and Clinical Surveillance Branch (BCSB) as a project officer for the National HIV Behavioral Surveillance System. In 2005, he became BCSB’s Associate Chief for Science and served for extended periods as an Acting Team Leader and the Acting Branch Chief for BCSB. From 2008-2009 Dr. Sanchez was the Chief of the Epidemiology and Strategic Information Branch of the CDC-South Africa Office and then moved into the HIV Epidemiology Branch as the Associate Chief for Science from 2009-2011. As of 2011, he has been an Associate Professor with the Rollins School of Public Health in the Department of Epidemiology. As part of this, Dr. Sanchez uses his expertise and interests in disease surveillance, HIV/AIDS, sexual behavior and public health practice in the development of PRISM Health-led projects and studies.


 Eli Rosenberg, PhD



Associate Professor


Dr. Rosenberg's research focuses on studies, methods, and analyses for understanding pertinent epidemiological issues in HIV/STI prevention, such as the racial disparities in HIV/STI among men who have sex with men (MSM) in the United States, the effects of STI and substance use on HIV acquisition, and the impact of care and prevention policies in reducing transmission. Specific methodological interests include surveillance methods, statistical and network modeling to inform public health policies, and development of software to support research studies. He also applies these methodological interests towards studies of Hepatitis C, Zika, and Dengue viruses. Dr. Rosenberg joined PRISM at its outset in 2008. His primary appointment is in the Department of Epidemiology and Biostatistics, University at Albany School of Public Health, State University of New York. He also maintains an adjunct associate professor title in the Department of Epidemiology, at Emory Rollins School of Public Health.




Colleen Kelley, MD MPH 



Assistant Professor


Dr. Kelley is a faculty member in the Division of Infectious Diseases with a multi-disciplinary background and previous experience in clinical HIV medicine, HIV epidemiology and clinical outcomes research, and laboratory based HIV research. The current focus of her research is on translational immunology studies of HIV susceptibility in men who have sex with men (MSM) with a particular interest in biomedical prevention interventions. The goal of her research is to work towards optimizing efficacy of HIV biomedical prevention interventions, such as an HIV vaccine, pre- and post-exposure prophylaxis, and microbicides, for populations at high risk of infection. She is currently principal investigator of two ongoing studies examining rectal mucosal immunology in men who have sex with men (MSM); one which focuses on the rectal mucosal effects of condomless receptive anal intercourse and one to understand the potential interaction of Pre-exposure Prophylaxis (PrEP) and rectal lubricant use in the rectal mucosa. Dr. Kelley has also served as a site investigator for the HVTN at the Hope Clinic for nearly 3 years.


Aaron Siegler, PhD MHS 



Research Assistant Professor


Dr. Siegler is a Research Assistant Professor in the Department of Epidemiology at the Rollins School of Public Health, Emory University. His research addresses behavioral and biomedical approaches to HIV prevention, with a focus on sexual minority populations. His current work includes research to facilitate the scale up of HIV pre-exposure prophylaxis (PrEP), to increase condom use through innovating the condom itself, and to use mobile technology to facilitate enhanced measurement in HIV research and to promote combination HIV prevention strategies that include PrEP.




Jodie Guest, PhD MPH 



Research Professor


Dr. Guest received both her doctorate in epidemiology and MPH from Emory University and her undergraduate degree from Baylor University. For the past 17 years, she was the Director of HIV Research at the Atlanta VA Medical Center where she was the co-founder of the HIV Atlanta VA Cohort Study (HAVACS), the largest HIV veterans cohort. She has taught at Rollins and SOM since 1999 and won the Golden Apple for Excellence in Teaching in the SOM and the Crystal Apple for excellence in graduate teaching. She is a PRISM investigator, the Director of the PA/MPH dual degree program, the track director for the executive MPH Applied Epidemiology Program and Director of Research for the South GA Farmworker Health Project from Emory SOM. She is on the steering committee for ART-CC, an international cohort collaboration of HIV researchers. Dr. Guest has published over 50 peer-reviewed papers, has presented at 77 national or international conferences, sits on six journal editorial boards, and has been the investigator on more than 50 HIV-related research projects. She has served on dissertation committees for three doctoral students, as mentor for 20 medical or PharmD resident research projects, and chair for 35 MPH thesis committees. She is the Founder and Executive Director of Teen Corp, a medical and philanthropy organization created to bring experiential learning to youth leaders. Her community work includes serving as the Chair of the Board of Directors for Communities in Schools Atlanta, the board for Georgia Humanities and the Board of Directors for Leadership Atlanta. She is a team captain and the Media Ambassador for the Susan G. Koman for the Cure 3-Day Breast Cancer Walk and has raised more than $550,000 in 16 walks. She is a logistics director for the Iditarod race in Alaska. She is a member of the Leadership Atlanta Class of 2011 and Leadership Georgia class of 2014.


 Samuel Jenness, PhD 



Assistant Professor


Dr. Jenness is an infectious disease epidemiologist specializing in mathematical and computational approaches for investigating the prevention and treatment of HIV and other sexually transmitted infections. He received his PhD from the University of Washington and his MPH from Boston University. His research interests are the integration of empirical epidemiology, mathematical modeling, and health economic frameworks to investigate critical questions in HIV and STI transmission. His research generally involves working on issues in the following scientific areas: HIV & STI epidemiology; Mathematical modeling of infectious disease; Social & contact network analysis; Causal inference methods for epidemiology; Survey research design and analysis; Computer science & computational epidemiology.




Kristin Wall, PhD 



Research Assistant Professor


After obtaining a degree in Biomedical Engineering in 2006, Dr. Wall sought advanced training in Epidemiology and Biostatistics and has been an Assistant Professor of Epidemiology at Emory University since 2012. Her research agenda strives to advance evidence-based decision-making to improve outcomes related to HIV and family planning. Specifically, Dr. Wall’s research focuses on improving efficiencies in HIV prevention and treatment and family planning through studies of service integration and cost-effectiveness both domestically and in limited-resource settings. She currently holds an NIH K01 award (2016-2020) to explore optimal HIV program resource allocations in Zambia. She is a Principal and Co-Investigator on several international and domestic grants to promote and integrate couples’ voluntary HIV counseling and testing with family planning services; promote effective contraception for prevention of unplanned pregnancy and perinatal HIV transmission; improve HIV prevention for key populations (discordant couples, sex workers, and men who have sex with men); and use technology to improve data quality and patient safety in clinical trials. She collaborates with the Emory-based Rwanda Zambia HIV Research Group (RZHRG); Programs, Research, & Innovation in Sexual Minority Health (PRISM) Group; and the Women's Interagency HIV Study (WIHS). Additionally, she greatly enjoys and prioritizes teaching epidemiological methods to students from a range of educational levels.

Jeb Jones, PhD MPH MS 



Research Assistant Professor


Dr. Jones has worked with PRISM since 2010, earning his PhD in epidemiology from Emory University in 2016. He previously earned a MPH in epidemiology from Emory and MS in psychology from the University of Florida. His research focuses on behavioral aspects of HIV risk, risk assessment methods, mobile-based HIV prevention interventions, and mathematical modeling approaches to understanding the HIV epidemic among men who have sex with men. Dr. Jones also enjoys teaching and mentoring. He serves as Thesis Advisor for students in the Applied Epidemiology track of the Executive Master of Public Health (EMPH) program and teaches epidemiology methods courses in the traditional MPH and EMPH programs.




Howa Yeung, MD





Dr. Yeung is a faculty member in the Department of Dermatology at the Emory University School of Medicine. He received his MD from New York University School of Medicine, pursued dermatoepidemiology research fellowship training at the University of Pennsylvania, and completed his dermatology residency and chief residency at Emory University. His research applies epidemiology and health services research methods to optimize prevention, screening, and treatment of skin diseases in sexual and gender minority populations, with particular interests in skin cancers and sexually transmitted diseases. He is currently the principal investigator of two ongoing studies to characterize skin cancer epidemiology among sexual minority populations and among older persons living with HIV.

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