Immunogenicity of Pfizer mRNA COVID-19 Vaccination Followed by J&J Adenovirus COVID-19 Vaccination in Two Patients with Chronic Lymphocytic Leukemia. - Lyski, Zoe L.; Kim, Myung Sun; Xthona Lee, David; Sampson, David; Raué, Hans-Peter; Raghunathan, Vikram; Ryan, Debbie; Brunton, Amanda E.; Slifka, Mark K.; Messer, William B.; Spurgeon, Stephen E. (Case Reports in Hematology, 2022)