Public health is the science and art of disease prevention, health promotion, and prolonging life and well-being on a population scale. A core guiding principle of public health is to advance health equity for all people, so that all may have the opportunity to achieve optimal health outcomes regardless of who they are or where they live. 

Our current research focus is on HIV prevention and treatment using new methodology to study causal mechanisms in networks of people. We aim to advance health equity for historically marginalized populations at greater risk of morbidity and mortality from HIV, such as those with substance use disorders and men who have sex with men (MSM), through our research in HIV treatment and prevention strategies. 

Previously, we used cutting-edge causal inference and network science methods to address the prevention and treatment of opioid use disorder using routinely-collected data. We also developed epidemiologic models for the transmission of SARS-CoV-2 in New York City to better account for underlying social network structures that are spatially resolved and evaluate interventions aimed at sheltering at-risk populations from COVID-19 and, ultimately, reducing health disparities and advancing health equity.