Blixt L, Wullimann D, Aleman S, Lundin J, Chen P, Gao Y, Cuapio A, Akber M, Lange J, Rivera-Ballesteros O, Buggert M, Ljunggren H-G, Hansson L, Österborg A. T-cell immune responses following vaccination with mRNA BNT162b2 against SARS-CoV-2 in patients with chronic lymphocytic leukemia: results from a prospective open-label clinical trial. Haematologica 2022;107(4):1000-1003; https://doi.org/10.3324/haematol.2021.280300.