Stable SARS‐CoV‐2 antibody levels and functionality in serum and COVID‐19 convalescent plasma after long‐term storage. - Laner‐Plamberger, Sandra; Siller, Anita; Lauth, Wanda; Kern, Jan Marco; Baskova, Lenka; Held, Nina; Kartal, Orkan; Schennach, Harald; Rohde, Eva; Grabmer, Christoph (Vox Sanguinis, 2025)