The RRs for neutropenia, anemia, thrombocytopenia, lymphopenia, pneumonia, diarrhea, and fatigue in the MAbs targeting CD38 group vs SLAMF7 group were 1.818 (95%CI 1.41–2.344), 0.932 (95%CI 0.656–1.323), 1.186 (95%CI 0.83–1.694), 1.043 (95%CI 0.753–1.444), 1.144 (95% CI0.72–1.817), 1.00 (95%CI 0.497–2.014), and 1.681 (95%CI 0.903–3.13), respectively. The gene discussed is CD38; the disease is lymphopenia.