In a single-center study of 240 patients with lymphoid malignancies — 181 with CLL, 21 with WM, and 38 with other non-Hodgkin lymphomas (NHLs) – patients with CLL were significantly more likely to have an antibody response to the Moderna vaccine compared to the Pfizer-BioNTech vaccine. This superior response was demonstrated in both treatment naïve and treated CLL populations in the study.