Martina Sester, PhD, is a professor of immunology and director of the department of transplant and infection immunology at Saarland University, Germany. She specialized in T-cell immunology with relevance to graft rejection and clinically relevant pathogens with specific interest on immunology towards cytomegalovirus, other herpesviruses, Mycobacterium tuberculosis, and more recently SARS-CoV-2. Her research focuses on basic understanding of antigen-specific immune regulation in immunocompromised patients, and on translational aspects of immunomonitoring of infectious complications and graft rejection. She is a member of national and international transplant societies and participated in national and international consensus conferences and guideline committees.