Kinetics of NAbs in patients with WM compared with controls after vaccination with 2 doses of the BNT162b2 or 1 dose of the AZD1222 vaccine. On day 22, patients had lower NAb inhibition titers compared with controls (see text). Only 21 of 106 (19.8%) patients had NAb titers of equal or more than 50%. Similarly, patients had lower NAb inhibition titers compared with controls on day 50 (see text). Only 31 of 74 (42%) patients had NAb titers of equal or more than 50%.