Fig. 1: Association of anti-SARS-CoV-2-spike IgG titer with age, COVID-19 severity, and cancer status.

Violin plots depicting anti-s IgG titers, measured within 6 months from the first positive SARS-CoV-2 PCR, in hematologic malignancy (HM) patients grouped according to age, COVID-19 severity, and cancer status. Bars represent median (thick line) and interquartile range (dotted line). Statistical analysis was performed by Kruskal–Wallis and Dunn’s tests.