In this week’s episode we'll review imbalances in gut microbiota may impact the efficacy and safety of immunochemotherapy in patients with diffuse large B-cell lymphoma. Next, the NFIA-ETO2 fusion, found exclusively in pediatric patients with pure erythroid leukemia, impairs the normal process of erythroid differentiation. Finally, we'll look at the effectiveness of nirmatrelvir plus ritonavir in patients with CLL infected with SARS-CoV-2 during the Omicron surge.