Univariate analysis for humoral immunization rate in patients diagnosed with hematologic malignancies. Analysis of the baseline characteristics that could confer a risk to a reduced humoral immunization rate to the mRNA-1273 vaccine according to overall response rate in patients with basal negative serology immunization and no previously known SARS-CoV-2 infection. CI, confidence interval; CR, complete response; PR, partial response; SD/PD, stable disease/progressive disease.