Holly Hagan
Holly Hagan, PhD, MPH
CDUHR - Co-Director
CDUHR - Associate Director, Infectious Disease Epidemiology and Social-behavioral Theory Core
NYU School of Global Public Health – Professor Emeritus
PhD, Epidemiology, University of Washington
MPH, Epidemiology, University of Massachusetts, Amherst
BA, Russian Studies, The Evergreen State College
Research Interests
Epidemiology, natural history, prevention and treatment of HCV and HIV in PWID and MSM, research methods and exploration of study bias
Holly Hagan is a Professor Emeritus in the Departments of Social Behavioral Sciences and Epidemiology at the NYU School of Global Public Health. Trained as an infectious disease epidemiologist, Dr. Hagan’s work has sought to understand the causes and consequences of substance use disorders.  Her research has examined blood-borne and sexually-transmitted infections among people who use drugs. She is an internationally-recognized expert in the etiology, epidemiology, natural history, prevention and treatment of hepatitis C virus infection among PWUD, and in 2014 her work was recognized by the US Department of Health and Human Services with the President’s Award for Leadership in the Control of Viral Hepatitis in the United States. Dr. Hagan served on the Institute of Medicine Committee on the Prevention and Control of Viral Hepatitis in the United States, and she has been an advisor to the US Department of Health and Human Services, the CDC, and the Canadian Institutes of Health on national programs to detect, diagnose and treat HCV infections. She was appointed to the National Academy of Medicine Committee on the Examination of the Integration of Opioid and Infectious Disease Prevention Efforts in Select Programs. In 2017, she was selected by NIDA to chair the Executive Steering Committee for the Rural Opioid Initiative funded by NIH, CDC, SAMHSA and the Appalachian Regional Commission.
Principal Investigator, Nurse-Community Health Worker-Family Partnership Model to Increase COVID-19 Testing in Urban Underserved and Vulnerable Communities. Active
Principal Investigator, Addressing Hepatitis C and Hepatocellular Carcinoma: The Current and Future Epidemics. Completed
Principal Investigator, Collaborative Injection Drug Users Study III: Drug User Intervention Trial (CIDUS/DUIT). Completed
Principal Investigator, Etiology and Prevention of HCV in IDUs (SPIN Project). Completed
Principal Investigator, National HIV Behavioral Surveillance – New York City. Completed
Principal Investigator, National HIV Behavioral Surveillance Among High Risk Heterosexuals: New York City. Completed
Principal Investigator, National HIV Behavioral Surveillance Among Injection Drug Users: New York City. Completed
Principal Investigator, Overdose Prevention in New York. Completed
Principal Investigator, Reducing HIV Transmission by Promoting Sexual Health Among Drug Users. Completed
Principal Investigator, Study to Reduce Intravenous Exposures (STRIVE). Completed
Principal Investigator, Synthesis: HCV Epidemiology and Prevention in Drug Users. Completed
Principal Investigator, Transition to Injection Drug Use in New York State in the Era of Prescription Opioid Misuse. Completed


Guilamo-Ramos V, Thimm-Kaiser M, Benzekri A, Johnson C, Williams D, Wilhelm-Hilkey N, Goodman M, Hagan H (2024).
Application of a heuristic framework for multilevel interventions to eliminate the impact of unjust social processes and other harmful social determinants of health
Prevention Science [Epub 2024 Apr 12]. doi: 10.1007/s11121-024-01658-x.

Lindenfeld Z, Hagan H, Chang JE (2023).
Exploring barriers and facilitators to integrating a harm reduction approach to substance use in three medical settings
Journal of General Internal Medicine, 38 (15), 3273-3282. doi: 10.1007/s11606-023-08231-2. PMCID: PMC10682333.

Chang JE, Lindenfeld Z, Hagan H (2023).
Integrating harm reduction into medical care: Lessons from three models
Journal of the American Board of Family Medicne, 36 (3), 449-461. doi: 10.3122/jabfm.2022.220303R3. PMCID: PMC10636714.

Bradley H, Austin C, Allen ST, Asher A, Bartholomew TS, Board A, Borquez A, Buchacz K, Carter A, Cooper HLF, Feinberg J, Furukawa N, Genberg B, Gorbach PM, Hagan H, Huriaux E, Hurley H, Luisi N, Martin NK, Rosenberg ES, Strathdee SA, Des Jarlais DC (2022).
A stakeholder-driven framework for measuring potential change in the health risks of people who inject drugs (PWID) during the COVID-19 pandemic
International Journal of Drug Policy, 110, 103889. doi: 10.1016/j.drugpo.2022.103889. PMCID: PMC9574463.

Gelpi-Acosta C, Cano M, Hagan H (2022).
Racial and ethnic data justice: The urgency of surveillance data disaggregation
Drug and Alcohol Dependence Reports, 4, 100082. doi: 10.1016/j.dadr.2022.100082. PMCID: PMC9881686.


Hagan H, Jordan AE, Neurer J, Cleland CM (2015).
Incidence of sexually transmitted hepatitis C virus infection in HIV-positive men who have sex with men
AIDS, 29 (17), 2335-2345. doi: 10.1097/QAD.0000000000000834. PMCID: PMC4640945.

Hagan H, Pouget ER, Des Jarlais DC, Lelutiu-Weinberger C (2008).
Meta-regression of hepatitis C virus infection in relation to time since onset of illicit drug injection: The influence of time and place
American Journal of Epidemiology, 168 (10), 1099-1109. doi: 10.1093/aje/kwn237. PMCID: PMC2727245.

Hagan H, Thiede H, Weiss NS, Hopkins SG, Duchin JS, Alexander ER (2001).
Sharing of drug preparation equipment as a risk factor for hepatitis C
American Journal of Public Health, 91 (1), 42-46. doi: 10.2105/AJPH.91.1.42. PMCID: PMC1446500.

Dr. Hagan's MyBibliography Profile
Selected Press
The White House observed World Hepatitis Day 2014. Holly Hagan was one of 12 leaders recognized for domestic and global work in the prevention and treatment of viral hepatitis.