Group Members

Joshua T Schiffer, MD, MS

Joshua T Schiffer, MD, MS

Title: Principal Investigator
Phone: 206.667.7359

I am an Associate Member in the Vaccine and Infectious Disease and Clinical Research Divisions at the Fred Hutchinson Cancer Research Center and an Associate Professor at the University of Washington in the Division of Allergy and Infectious Diseases, Department of Medicine. I love identifying problems in the clinic and the infectious diseases literature that can be addressed with mathematical models. I feel privileged to collaborate with such a driven and gifted group of multi-disciplinary scientists and clinicians at Fred Hutchinson and the University of Washington.

Pavitra Roychoudhury, PhD

Pavitra Roychoudhury, PhD

Title: Acting Instructor / Research Associate

I work with the Jerome and Schiffer groups on modeling and bioinformatics problems related to HSV and HIV cure. I received my PhD in Bioinformatics and Computational Biology from the University of Idaho where I studied the effects of spatial structure on bacteriophage evolution. My research interests include spatial models of viral evolution and immunity; computational methods for sequence analysis of viral genomes; and mathematical models of gene therapy-based cure efforts.

Daniel Reeves, PhD

Daniel Reeves, PhD

Title: Research Associate

I am a Research Associate with the Schiffer group working on models of HIV. I received a PhD in physics from Dartmouth College, but was always inspired by biological problems. The complex dynamics at work in viral infection drew me to theoretical immunology originally, and I now integrate my background from physical modeling into providing new insights into cellular processes, linking the mathematics of ecology and immunology, and ultimately, helping to cure HIV.

David Swan, MS, MME

David Swan, MS, MME

Title: Bioinformatics Analyst

I have worked for several years in the Schiffer group developing compartmental and agent-based spatial models for various infectious diseases with a primary focus on HSV.  Additionally, I have worked with several other groups at Fred Hutchinson providing simulation expertise and other types of computing support. Prior to working at Fred Hutchinson, I was a senior software engineer with F5 Networks and Boeing as well as serving as a high school teacher with the Peace Corps in Kenya, East Africa. I have a degree in Electrical Engineering from Stanford and graduate degrees in Computer Science and Medical Engineering from UW.

Elizabeth Duke, MD

Elizabeth Duke, MD

Title: Research Associate

I joined the group in the summer of 2015 as an Infectious Disease Fellow. I studied Math and Latin at Marshall University in West Virginia as an undergraduate, Math as a master's student, and Medicine at Marshall's School of Medicine. After completing my residency in Internal Medicine at the University of Wisconsin (UW), I came to the Pacific Northwest as an Infectious Disease Fellow at the University of Washington (UW). Staying on at the UW and Fred Hutch as a KL2 scholar in the Institute for Translational Health Sciences (ITHS), I am currently working on projects that include intra-host models of CMV and HIV latency.

Florencia Tettamanti Boshier, PhD

Florencia Tettamanti Boshier, PhD

Title: Post-Doctoral Research Associate

I am a Post-Doctoral Research Fellow in the Schiffer Group. I have a PhD in Fluid Dynamics from the Imperial College London, where I held a post-doctoral position before joining the group here at Fred Hutchinson. As an applied mathematician, I enjoy developing mathematical models that can elucidate the complex dynamics of infectious diseases and inform the development of new cures and treatments for them. Currently, I am using time series analysis to study the dynamics of the vaginal microbiome in women with BV.

E. Fabian Cardozo-Ojeda, PhD

E. Fabian Cardozo-Ojeda, PhD

Title: Staff Scientist

I am a staff scientist with the Schiffer group in the Vaccine and Infectious Disease Division. My work focuses on developing theories to address questions related to virus and immune system dynamics, and response to therapeutic strategies especially in the context of HIV-1 infection. The theoretical approaches involve the use of mathematical models and statistical tools to analyze and interpret kinetics patterns observed in data. I recently finished as a postdoctoral researcher at Los Alamos National Labs working with Alan Perelson and Ruy Ribeiro doing mathematical modeling to understand the with-in host dynamics of HIV-1 during different therapy approaches. I received my Ph.D. from the Department of Electrical and Computer Engineering at the University of Delaware working with Ryan Zurakowski.

Subhasish Baral, PhD

Subhasish Baral, PhD

Title: Post-Doctoral Research Associate

I am a Post-Doctoral Research Associate working on developing mathematical models to uncover future cure strategies for HIV. This includes work identifying the mechanism of anti-proliferative drugs, such as mycophenolate mofetil (MMF) in HIV infected individuals. Before joining the group, I was a Ph.D. candidate under the supervision of Prof. Narendra M. Dixit and Prof. Rahul Roy at Indian Institute of Science. In my doctoral work, I developed mathematical models to understand CD8 T cell exhaustion both at population and single cell level.

Ashish Goyal, PhD

Ashish Goyal, PhD

Title: Post-Doctoral Research Associate