Overbaugh/Lehman Lab Members

Julie Overbaugh, PhD

Title: Principal Investigator

Email: joverbau@fredhutch.org

Professor, Human Biology and Public Health Sciences Division
Endowed Chair for Graduate Education

Dara Lehman, MHS, PhD

Title: Research Associate Professor

Email: dlehman@fredhutch.org

2003-present
Research Associate Professor, Human Biology, Fred Hutch
Affiliate Associate Professor, UW Department of Global Health
Faculty Consultant, Office of Education and Training, Fred Hutch
Lehman Lab
myNCBI

Jamie Guenthoer, PhD

Title: Senior Staff Scientist

Email: jguentho@fredhutch.org

2021-present

Laura Doepker, PhD

Title: Postdoctoral Fellow

Email: lnoges@fredhutch.org

2016-present
I study the evolution of human antibody responses directed against HIV-1 infection. We sequence antibody genes from B cells within longitudinal patient blood samples to estimate how their HIV-specific antibody lineages developed.

Delphine Depierreux, PhD

Title: Postdoctoral Fellow

Email: ddepierr@fredhutch.org

2022-present
I study the evolution of broad neutralizing antibodies to viruses such as HIV-1 and SARS-CoV-2. More specifically, I aim to discover the antigens required to elicit their development, in view to inform vaccine design. I also have a strong interest in global public health and translating research into practical applications.

Caitlin Stoddard, PhD

Title: Postdoctoral Fellow

Email: cstoddar@fredhutch.org

2019-present
I study mechanisms of adaptive and innate immunity against emerging and endemic human coronaviruses.

Caroline Phan

Title: Graduate Research Assistant

Email: cphan@fredhutch.org

2023-present
I am broadly interested in early life immunity to viral infections. I study how recurrent CMV activation impacts HIV reservoir clonality in a longitudinal cohort of Kenyan children living with HIV

Vrasha Chohan

Title: Research Technician

Email: vchohan@fredhutch.org

2008-present
I perform Gen Probe QC HIV viral RNA loads and population based sequencing for resistant mutations for women on ARV for the QRS cohort. I’ve also been involved with neutralization assays using the PBMC and TZM methods for PBMC and 293T-passaged chimeras with monoclonal antibodies.

Carolyn Fish

Title: Research Technician

Email: csfish@fredhutch.org

2019-present
I am interested in studying the diversity and evolution of HIV-1 in Kenyan infants to understand the timing of infection.

Vessel sculpture and Arnold Building on Fred Hutch campus

Rachel Fish

Title: Research Technician

Email: rfish2@fredhutch.org

2025-present

Morgan Litchford

Title: Research Technician

Email: mlitchfo@fredhutch.org

2021-present
I am interested in the relationship between infectious diseases and their hosts. Specifically, I will study how immune responses correlate with HIV clearance in Kenyan infants.

Michelle Lilly

Title: Research Technician

Email: mlilly@fredhutch.org

2021-present
I am interested in studying immune responses to SARS-CoV-2; specifically, antibody responses to SARS-CoV-2 breakthrough infections in vaccinated individuals.