Fig. 1

a Anti-spike IgG levels compared at day 56 after first vaccine injection between multiple myeloma patients and healthy controls. p = 0.0013 using Mann–Whitney test. b Neutralizing activity of anti-SARS-CoV-2 antibodies compared at day 56 after first vaccine injection between multiple myeloma patients and Healthy controls. p = 0.0002 using Mann–Whitney test