Negative PCR test results for KSHV/HHV-8 on cell DNA from 2 myeloma patients (lanes 2 and 3) and a clear KSHV/HHV-8 band in BCBL cells (lane 1); positive PCR for β-globin of the patients' cell DNA (lanes 4 and 5); and no effects on viral amplification of patients' DNA mixed with BCBL cell DNA (lanes 6 and 7).