Joseph Lewnard

Joseph Lewnard is an Associate Professor of Epidemiology at the University of California, Berkeley School of Public Health. His research focuses on infectious disease transmission dynamics, vaccine impact assessment, and antimicrobial resistance. He holds a PhD from Yale University (2017) and completed a postdoctoral fellowship at Harvard TH Chan School of Public Health (2018).

Research interests include mathematical modeling of respiratory and vaccine-preventable pathogens, with emphasis on pneumococcal vaccines and their effects on antibiotic use. His work bridges computational methods with field studies, collaborating with institutions like Kaiser Permanente and global health agencies.

Key awards include the 2025 ASPPH Early Career Research Excellence Award and the 2021 National Academy of Medicine Emerging Leaders Scholar distinction. He has redirected efforts during the pandemic to study SARS-CoV-2 epidemiology in California and India, including studies on Omicron variant transmission and vaccine effectiveness.

Publications highlight vaccine impact on antimicrobial resistance, mpox clinical progression, and pediatric antibiotic use trends. He co-leads studies on farmworker health disparities and SARS-CoV-2 dynamics in low-resource settings. Grants and partnerships emphasize translational research to inform public health policy.