Sabra L Klein | Professor of Molecular Microbiology and Immunology
Johns Hopkins Bloomberg School of Public Health

Dr. Klein is a Professor of Molecular Microbiology & Immunology, Biochemistry & Molecular Biology, and International Health at the Johns Hopkins Bloomberg School of Public Health and Department of Medicine at the Johns Hopkins School of Medicine. She co-directs the Johns Hopkins Center for Women’s Health, Sex, and Gender Research. She is an expert on sex differences in immune responses to microbes and vaccines, with interrogation of sex-specific effects of aging and pregnancy in humans and animal models. She has over 200 peer-reviewed publications, authored several book chapters, edited three books on the broad topics of sex differences in response to infection and treatments for infectious diseases, and is listed in the top 2% researchers worldwide for publications. During the 2009 influenza pandemic, she was commissioned by the WHO to evaluate and publish a report on the impact of sex, gender, and pregnancy on the outcome of influenza virus infection. During the COVID-19 pandemic, Dr. Klein wrote commentaries for several journals and was interviewed by several major news media outlets about sex differences in immunity, disease outcomes, and responses to vaccines. She is a fellow of the American Academy of Microbiology and the American Association for the Advancement of Science. In 2023, she received the Vivian Pinn Award for Outstanding Research in Women’s Health.