Hos patienter behandlet med immunsuppressiva, herunder Rapamune, er der rapporteret tilfælde af både BK- virus associeret nephropati og JC- virus associeret progressiv multifokal leukoencefalopati (PML).
26 Cases of BK virus associated nephropathy, as well as cases of JC virus associated progressive multifocal leukoencephalopathy (PML), have been reported in patients treated with immunosuppressants, including Rapamune.