“…A recent meta-analysis evaluated the relationship between MMF and seroconversion after SARS-CoV-2 immunization in SOT recipients. When the analysis was restricted to studies performed in LTR, the negative effect of MMF was consistent (OR=0.46; 95%CI 0.31–0.68; p<.001) [14] . In some studies, a dose-dependent impairment of the humoral response was observed, particularly when the daily dose of MMF was higher than 1000 mg per day [ 12 , 14 ].…”