Reduced humoral but stable cellular SARS-CoV-2-specific immunity in liver transplant recipients in the first year after COVID-19. oleh Theresa Kirchner, Sophia Heinrich, Agnes Bonifacius, Bastian Engel, Louisa Ruhl, Isabell Pink, Nele Thomas, Joerg Martens, Marius M Hoeper, Rainer Blasczyk, Heiner Wedemeyer, Elmar Jaeckel, Yang Li, Christine S Falk, Britta Eiz-Vesper, Richard Taubert