Serological response rates to COVID-19 vaccine. (A) Percentage of response rates in patients with B-NHL vs age-compatible, healthy controls. (B) Median values and range of anti-SARS-CoV-2 Ab titer levels in patients with B-NHL vs healthy controls. Mean titers ± standard deviation for each group are presented. (C-D) Distribution of anti-SARS-CoV-2 Ab titer levels among B-NHL patients and healthy controls. In panel C, each bar represents 1 patient with B-NHL, in panel D, each bar represents 1 healthy control.