Sibylle C Mellinghoff, Sandra Robrecht, Rosanne Sprute, Leonie Mayer, Leonie M Weskamm, Christine Dahlke, Henning Gruell, Finn Teipel, Hans A Schlößer, Klara Siepmann, Martin Thelen, Anna-Maria Fink, Kirsten Fischer, Florian Klein, Marylyn M Addo, Androniki Kolovou, Oliver A Cornely, Barbara Eichhorst, Michael Hallek, Petra Langerbeins
OBJECTIVE: Preventing severe COVID-19 remains a priority globally, particularly in the immunocompromised population. As shown in healthy individuals, immunity against SARS-CoV-2 can be yielded by previous infection, vaccination, or both (hybrid immunity). The objective of this observation study was to investigate hybrid immunity in patients with chronic lymphocytic leukemia (CLL). METHODS/RESULTS: Blood samples of six patients with CLL were collected 55 days after fourth COVID-19 vaccination...
February 4, 2024: European Journal of Haematology